SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM 10-Q

[X]   QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES AND
      EXCHANGE ACT OF 1934 FOR THE QUARTERLY PERIOD ENDED: MARCH 31, 2005

[ ]   TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES AND
      EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM __________ TO
      __________.

Commission File number: 0-10004

                           NAPCO SECURITY SYSTEMS, INC
              ----------------------------------------------------
             (Exact name of Registrant as specified in its charter)

          Delaware                                         11-2277818
- -------------------------------                    ----------------------------
(State or other jurisdiction of                    (IRS Employer Identification
 incorporation of organization)                               Number)

          333 Bayview Avenue
         Amityville, New York                                11701
- ----------------------------------------           -----------------------------
(Address of principal executive offices)                   (Zip Code)

                                 (631) 842-9400
               ---------------------------------------------------
               (Registrant's telephone number including area code)

                                      None
             ------------------------------------------------------
             (Former name, former address and former fiscal year if
                            changed from last report)

Indicate by check mark whether the registrant (1) has filed all reports required
to be filed by Section 13 or 15(d) of the Securities and Exchange Act of 1934
during the preceding 12 months (or shorter period that the registrant was
required to file such reports), and (2) has been subject to such filing
requirements for the past 90 days:

                  Yes [X]                No [ ]

Indicate by check mark whether the registrant is an accelerated filer (as
defined in Rule 12b-2 of the Exchange Act):

                  Yes [ ]                No [X]

Number of shares outstanding of each of the issuer's classes of common stock, as
of: MAY 2, 2005

             COMMON STOCK, $.01 PAR VALUE PER SHARE      8,635,430





                                                                                Page
                                                                                ----
                                                                             
PART I: FINANCIAL INFORMATION

     ITEM 1.   Financial Statements

          NAPCO SECURITY SYSTEMS, INC AND SUBSIDIARIES
          INDEX - MARCH 31, 2005

              Condensed Consolidated Balance Sheets, March 31, 2005 and
              June 30, 2004                                                       3

              Condensed Consolidated Statements of Income for the Three
              Months ended March 31, 2005 and 2004                                4

              Condensed Consolidated Statements of Income for the Nine
              Months ended March 31, 2005 and 2004                                5

              Condensed Consolidated Statements of Cash Flows for the Nine
              Months ended March 31, 2005 and 2004                                6

              Notes to Condensed Consolidated Financial Statements                7

     ITEM 2.   Management's Discussion and Analysis of Financial Condition and
                Results of Operations                                            13

     ITEM 3.   Quantitative and Qualitative Disclosures About Market Risk        18

     ITEM 4.   Controls and Procedures                                           18

PART II: OTHER INFORMATION                                                       18

SIGNATURE PAGE                                                                   19


                                        2


PART I: FINANCIAL INFORMATION

ITEM 1. Financial Statements

                  NAPCO SECURITY SYSTEMS, INC AND SUBSIDIARIES
                      CONDENSED CONSOLIDATED BALANCE SHEETS



                                                                    March 31,            June 30,
                                                                 2005 (unaudited)          2004
                                                                 ----------------       ----------
                                                                 (in thousands, except share data)
                                                                                  
                           ASSETS
Current Assets:
    Cash                                                            $    1,153          $      796
    Accounts receivable, less allowance for doubtful accounts           17,587              19,927
    Inventories, net                                                    15,232              14,594
    Prepaid expenses and other current assets                              841                 760
    Deferred income taxes                                                1,763               1,763
                                                                    ----------          ----------
      Total current assets                                              36,576              37,840
Property, Plant and Equipment, net                                       8,722               8,987
Goodwill                                                                 9,686               9,686
Other assets                                                               170                 159
                                                                    ----------          ----------
                                                                    $   55,154          $   56,672
                                                                    ==========          ==========

        LIABILITIES AND STOCKHOLDERS' EQUITY

Current Liabilities:
    Current portion of long-term debt                               $        -          $    1,900
    Accounts payable                                                     4,597               3,789
    Accrued expenses                                                       937                 963
    Accrued salaries and wages                                           1,894               1,911
    Accrued income taxes                                                   498                 285
                                                                    ----------          ----------
        Total current liabilities                                        7,926               8,848

Long-term debt                                                           2,913               6,400
Accrued income taxes                                                     2,520               2,243
Deferred income taxes                                                    1,277               1,277
                                                                    ----------          ----------
        Total liabilities                                               14,636              18,768
                                                                    ----------          ----------
Stockholders' Equity (Note 1) *:
    Common stock, par value $.01 per share; 21,000,000 shares
      authorized, 8,635,430 and 8,503,670 shares issued and
      outstanding, respectively                                             86                  85
    Additional paid-in capital                                          11,596              11,381
    Retained earnings                                                   28,836              26,438
                                                                    ----------          ----------
        Total stockholders' equity                                      40,518              37,904
                                                                    ----------          ----------
                                                                    $   55,154          $   56,672
                                                                    ==========          ==========


* The 20% stock dividend declared on November 8, 2004 (see Note 1), has been
retroactively reflected in Stockholders' Equity. See accompanying notes to
condensed consolidated financial statement

                                        3


                  NAPCO SECURITY SYSTEMS, INC AND SUBSIDIARIES
             CONDENSED CONSOLIDATED STATEMENTS OF INCOME (unaudited)



                                                                           Three Months Ended
                                                                                March 31,
                                                                   ----------------------------------
                                                                       2005                  2004
                                                                   ------------          ------------
                                                             (in thousands, except share and per share data)
                                                                                   
Net Sales                                                          $     15,743          $     14,742
Cost of Sales                                                            10,647                10,120
                                                                   ------------          ------------

            Gross profit                                                  5,096                 4,622
Selling, General and Administrative Expenses                              3,423                 3,363
                                                                   ------------          ------------

            Operating income                                              1,673                 1,259
                                                                   ------------          ------------

Interest Expense, net                                                        50                   101
Other Expenses, net                                                          72                    30
                                                                   ------------          ------------

            Other expenses                                                  122                   131
                                                                   ------------          ------------

            Income before provision for income taxes                      1,551                 1,128
Provision for income taxes                                                  538                   394
                                                                   ------------          ------------

            Net income                                             $      1,013          $        734
                                                                   ============          ============

Net income per share (Note 1 and Note 4) *:       Basic            $       0.12          $       0.09
                                                                   ============          ============

                                                  Diluted          $       0.11          $       0.09
                                                                   ============          ============

Weighted average number of shares
            outstanding (Note 1 and Note 4) *:    Basic               8,577,126             8,048,102
                                                                   ============          ============

                                                  Diluted             9,055,540             8,337,089
                                                                   ============          ============


* The 20% stock dividend declared on November 8, 2004 (see Note 1), has been
retroactively reflected in all 2004 share and per share data.

     See accompanying notes to condensed consolidated financial statements

                                       4


                  NAPCO SECURITY SYSTEMS, INC AND SUBSIDIARIES
            CONDENSED CONSOLIDATED STATEMENTS OF INCOME (unaudited)



                                                                               Nine Months Ended
                                                                                   March 31,
                                                                      ----------------------------------
                                                                          2005                  2004
                                                                      ------------          ------------
                                                                (in thousands, except share and per share data)
                                                                                      
Net Sales                                                             $     45,202          $     39,206
Cost of Sales                                                               30,915                27,049
                                                                      ------------          ------------

            Gross profit                                                    14,287                12,157
Selling, General and Administrative Expenses                                10,263                 9,945
                                                                      ------------          ------------

            Operating income                                                 4,024                 2,212
                                                                      ------------          ------------

Interest Expense, net                                                          176                   331
Other Expenses, net                                                            170                    66
                                                                      ------------          ------------

            Other expenses                                                     346                   397
                                                                      ------------          ------------

            Income before provision for income taxes                         3,678                 1,815
Provision for income taxes                                                   1,280                   635
                                                                      ------------          ------------

            Net income                                                $      2,398          $      1,180
                                                                      ============          ============

Net income per share (Note 1 and Note 4) *:          Basic            $       0.28          $       0.15
                                                                      ============          ============

                                                     Diluted          $       0.27          $       0.15
                                                                      ============          ============

Weighted average number of shares
            outstanding (Note 1 and Note 4) *:       Basic               8,536,390             7,866,338
                                                                      ============          ============

                                                     Diluted             8,975,625             8,126,422
                                                                      ============          ============


* The 20% stock dividend declared on November 8, 2004 (see Note 1), has been
retroactively reflected in all 2004 share and per share data.

     See accompanying notes to condensed consolidated financial statements

                                        5


                  NAPCO SECURITY SYSTEMS, INC AND SUBSIDIARIES
           CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited)



                                                                                                   Nine Months Ended
                                                                                                       March 31,
                                                                                          -----------------------------------
                                                                                               2005                  2004
                                                                                          ------------           ------------
                                                                                                     (in thousands)
                                                                                                           
Cash Flows from Operating Activities:
            Net income                                                                    $      2,398           $      1,180
            Adjustments to reconcile net income to net cash provided by
               operating activities:
                        Depreciation and amortization                                              844                    854
                        (Recovery of) provision for doubtful accounts                              (35)                    90
            Changes in operating assets and liabilities:
                        Accounts receivable                                                      2,375                  1,430
                        Inventories                                                               (638)                   458
                        Prepaid expenses and other current assets                                  (81)                   (98)
                        Other assets                                                               (42)                    80
                        Accounts payable, accrued expenses, accrued salaries and
                          wages, and accrued income taxes                                        1,255                   (821)
                                                                                          ------------           ------------

Net Cash Provided by Operating Activities                                                        6,076                  3,173
                                                                                          ------------           ------------

Cash Flows used in Investing Activities:
            Net purchases of property, plant and equipment                                        (548)                  (444)
                                                                                          ------------           ------------

Cash Flows from Financing Activities:
            Proceeds from exercise of employee stock options                                       216                    890
            Proceeds from long-term debt                                                         2,350                  1,000
            Principal payments on long-term debt                                                (7,737)                (4,925)
                                                                                          ------------           ------------

                        Net cash used in financing activities                                   (5,171)                (3,035)
                                                                                          ------------           ------------

Net Increase (decrease) in Cash                                                                    357                   (306)

Cash, Beginning of Period                                                                          796                  1,794
                                                                                          ------------           ------------

Cash, End of Period                                                                       $      1,153           $      1,488
                                                                                          ============           ============

Cash Paid During the Period for:

            Interest                                                                      $        177           $        336
                                                                                          ============           ============

            Income taxes                                                                  $        784           $         96
                                                                                          ============           ============


See accompanying notes to condensed consolidated financial statement.

                                        6


                  NAPCO SECURITY SYSTEMS, INC AND SUBSIDIARIES
             NOTES TO CONDENSED CONSOLIDATED STATEMENTS (unaudited)

1.)   Summary of Significant Accounting Policies and Other Disclosures

      The accompanying Condensed Consolidated Financial Statements are
      unaudited. In management's opinion, all adjustments (consisting of only
      normal recurring accruals) necessary for a fair presentation have been
      made. The results of operations for the periods ended March 31, 2005 are
      not necessarily indicative of results that may be expected for any other
      interim period or for the full year.

      The unaudited Condensed Consolidated Financial Statements include the
      accounts of the Company after elimination of all material inter-company
      balances and transactions. The Company has made a number of estimates and
      assumptions relating to the assets and liabilities, the disclosure of
      contingent assets and liabilities and the reporting of revenues and
      expenses to prepare these financial statements in conformity with
      accounting principles generally accepted in the United States. Actual
      results could differ from those estimates. The unaudited Condensed
      Consolidated Financial Statements should be read in conjunction with the
      Consolidated Financial Statements and related notes contained in the
      Company's Annual Report on Form 10-K for the year ended June 30, 2004. The
      accounting policies used in preparing these unaudited Condensed
      Consolidated Financial Statements are consistent with those described in
      the June 30, 2004 Consolidated Financial Statements.

      Advertising and Promotional Costs

      Advertising and promotional costs are included in "Selling, General and
      Administrative" expenses in the Condensed Consolidated Statements of
      Income and are expensed as incurred. Advertising expense for the three
      months ended March 31, 2005 and 2004 was $188,000 and $314,000,
      respectively. Advertising expense for the nine months ended March 31, 2005
      and 2004 was $883,000 and $961,000, respectively.

      Research and Development Costs

      Research and development costs incurred by the Company are charged to
      expense in the period incurred. Research and Development expense for the
      three months ended March 31, 2005 and 2004 was $1,484,000 and $1,332,000,
      respectively. Research and Development expense for the nine months ended
      March 31, 2005 and 2004 was $4,461,000 and $3,885,000, respectively. The
      increase in Research and Development costs is due primarily to increased
      salary expenses relating to the Company's Engineering departments. These
      expenses are included in "Cost of Sales" in the Condensed Consolidated
      Statements of Income.

      Business Concentration and Credit Risk

      An entity is more vulnerable to concentrations of credit risk if it is
      exposed to risk of loss greater than it would have had it mitigated its
      risk through diversification of customers. Such risks of loss are manifest
      differently, depending on the nature of the concentration, and vary in
      significance. The Company has two major customers with Sales and Accounts
      Receivable as follows (in thousands):



                      Sales for the three months
                             ended March 31,
                  -----------------------------------
                   2005               2004
                     $        %        $         %
                  -------   ------   -------   ------
                                   
Customer A         1,353      8%      1,329      9%
Customer B         1,374      9%      1,123      8%
                   -----    ---       -----    ---
                   2,727     17%      2,452     17%
                   =====    ===       =====    ===




                      Sales for the nine months
                            ended March 31,
                  -----------------------------------
                   2005               2004
                     $        %         $        %
                  -------   ------   -------   ------
                                   
Customer A         3,452      7%      2,903      7%
Customer B         3,945      9%      2,334      6%
                   -----    ---       -----    ---
                   7,397     16%      5,237     13%
                   =====    ===       =====    ===


                                        7




                     Accounts Receivable as of:
                 ---------------------------------
                 March 31,         June 30,
                   2005              2004
                    $         %        $       %
                 ---------  -----  --------  -----
                                 

Customer A         4,599     26%     4,197    21%
Customer B         2,570     15%     2,071    10%
                   -----    ---      -----   ---
                   7,169     41%     6,268    31%
                   =====    ===      =====   ===


      These customers sell primarily within North America. Although management
      believes that these customers are sound and creditworthy, a severe adverse
      impact on their business operations could have a corresponding material
      adverse effect on our net sales, cash flows, and/or financial condition.
      In the ordinary course of business, we have established an allowance for
      doubtful accounts and customer deductions in the amount of $320,000 and
      $355,000 as of March 31, 2005 and June 30, 2004, respectively. The
      allowance for doubtful accounts is a subjective critical estimate that has
      a direct impact on reported net earnings. This allowance is based upon the
      evaluation of accounts receivable aging, specific exposures and historical
      trends.

      Stock Options

      During the nine months ended March 31, 2005 the Company granted no stock
      options under its 2002 Employee Incentive Stock Option Plan. 90,720 and
      131,760 options were exercised under this plan during the three and nine
      months ended March 31, 2005, respectively.

      Stock Dividend and Stock Split

      In November 2004, the Company's Board of Directors approved a twenty
      percent (20%) stock dividend of the Company's common stock payable to
      stockholders of record on November 22, 2004. The effect of the stock
      dividend, which has been accounted for similar to a stock split, has been
      retroactively reflected in all share and per share data. The additional
      shares of 1,424,118 were distributed on December 6, 2004. There is no net
      effect on total stockholders' equity as a result of the stock dividend.

      In March 2004, the Company's Board of Directors approved a two-for-one
      stock split in the form of a 100% stock dividend of the Company's common
      stock payable to stockholders of record on April 13, 2004. The additional
      shares were distributed on April 27, 2004. The Company utilized all
      2,871,056 of its shares held as Treasury stock as of April 27, 2004 plus
      an additional 609,260 shares in paying this stock dividend. There was no
      net effect on total stockholders' equity as a result of the stock split.

      Recent Accounting Pronouncements

      In November 2004, the Financial Accounting Standards Board ("FASB") issued
      Statement of Financial Accounting Standards ("FAS") No. 151, "Inventory
      Costs, an amendment of ARB No. 43, Chapter 4" ("FAS 151"). FAS 151
      clarifies that abnormal inventory costs such as costs of idle facilities,
      excess freight and handling costs, and wasted materials (spoilage) are
      required to be recognized as current period costs. The provisions of FAS
      151 are effective for fiscal 2006. Management is currently evaluating the
      provisions of FAS 151 and does not expect adoption will have a material
      impact on the Company's financial position, results of operations, or cash
      flows.

      In December 2004, the FASB finalized FAS No. 123R "Share-Based Payment"
      ("FAS 123R"), amending FAS No. 123, effective beginning the Company's
      first quarter of fiscal 2006. FAS 123R will require the Company to expense
      stock options based on grant date fair value in its financial statements.
      Further, the adoption of FAS 123R will require additional accounting
      related to the income tax effects and additional disclosure regarding the
      cash flow effects resulting from share-based payment arrangements. The
      effect of expensing stock options on the Company's results of operations
      using a Black-Scholes option-pricing model is presented in Note 2. The
      adoption of FAS 123R will have no effect on the Company's cash flows or
      financial position, but will have an adverse impact on results of
      operations.

      In December 2004, the FASB issued FASB Staff Position No. FAS 109-2,
      "Accounting and Disclosure Guidance for the Foreign Earnings Repatriation
      Provision within the American Jobs Creation Act of 2004", ("SP FAS
      109-2"). The American Jobs Creation Act introduces a special one-time
      dividends received deduction on the repatriation of certain foreign
      earnings to a U.S. taxpayer

                                        8


      ("repatriation provision"), provided certain criteria are met. SP FAS
      109-2 provides accounting and disclosure guidance for the repatriation
      provision. Although SP FAS 109-2 is effective immediately, until the
      Treasury Department or Congress provides additional clarifying language on
      key elements of the repatriation provision, the Company is unable to
      determine the amount of foreign earnings, if any, that would be
      repatriated. Accordingly, the Company will complete its evaluation after
      the necessary guidance is provided.

      In December 2004, the FASB issued FAS No. 153, "Exchanges of Nonmonetary
      Assets - an amendment of APB Opinion No. 29". This statement amends APB
      Opinion No. 29 to eliminate the exception for nonmonetary exchanges of
      similar productive assets and replaces it with a general exception for
      exchanges of nonmonetary assets that do not have commercial substance. A
      nonmonetary exchange has commercial substance if the future cash flows of
      the entity are expected to change significantly as a result of the
      exchange. The provisions of FAS No. 153 are effective for the Company's
      fiscal year ending June 2006. The adoption of FAS No. 153 is not expected
      to have a material impact on the Company's consolidated financial
      position, liquidity, or results of operations.

      2.) Employee Stock-based Compensation

      The Company has established a number of share incentive programs as
      discussed in more detail in the Company's annual report on Form 10-K for
      the year ended June 30, 2004. The Company applies the intrinsic value
      method as outlined in Accounting Principles Board Opinion No. 25,
      "Accounting for Stock Issued to Employees", and related interpretations in
      accounting for stock options and share units granted under these programs.
      Under the intrinsic value method, no compensation expense is recognized if
      the exercise price of the Company's employee stock options equals the
      market price of the underlying stock on the date of grant. Accordingly, no
      compensation cost has been recognized. The Company adopted the disclosure
      portion of FAS No. 148, "Accounting for Stock-Based Compensation -
      Transition and Disclosure" requiring quarterly FAS No. 123 pro forma
      disclosure.

      As discussed in Note 1, FAS No. 123R will require the Company to expense
      stock options based on grant date fair value in its financial statements.
      The effect of expensing stock options on the Company's results of
      operations using a Black-Scholes option-pricing model is presented in the
      following pro forma table:



                                                           Three Months          Nine Months
                                                          Ended March 31,       Ended March 31,
                                                      --------------------    --------------------
                                                        2005        2004        2005        2004
                                                      --------    --------    --------    --------
                                                          (in thousands, except per share data)
                                                                              

Net income, as reported                               $  1,013    $    734    $  2,398    $  1,180
Deduct: Total stock-based employee compensation
        expense determined under fair value method
        for all awards, net of related tax effects         (55)        (63)       (171)       (118)
                                                      --------    --------    --------    --------
Pro forma net income                                  $    958    $    671    $  2,227    $  1.062
                                                      ========    ========    ========    ========
Earnings per common share (1):
        Basic - as reported                           $   0.12    $   0.09    $   0.28    $   0.15
                                                      ========    ========    ========    ========
        Basic - pro forma                             $   0.11    $   0.08    $   0.26    $   0.14
                                                      ========    ========    ========    ========
        Diluted - as reported                         $   0.11    $   0.09    $   0.27    $   0.15
                                                      ========    ========    ========    ========
        Diluted - pro forma                           $   0.11    $   0.08    $   0.25    $   0.13
                                                      ========    ========    ========    ========


(1) Information reflects stock dividend and stock split. See Note 1.



                              March 31,         June 30,
                                2004              2005
Inventories consist of:       ---------        ----------
                                         
                                    (in thousands)

Component parts               $   9,835        $    9,423
Work-in-process                   1,411             1,352
Finished products                 3,986             3,819
                              ---------        ----------
                              $  15,232        $   14,594
                              =========        ==========


For interim financial statements, inventories are calculated using a gross
profit percentage.

                                        9


4.) Earnings Per Common Share

      The Company follows the provisions of FAS No. 128, "Earnings Per Share".
      In accordance with FAS No. 128, earnings per common share amounts ("Basic
      EPS") were computed by dividing earnings by the weighted average number of
      common shares outstanding for the period. Earnings per common share
      amounts, assuming dilution ("Diluted EPS"), were computed by reflecting
      the potential dilution from the exercise of stock options. FAS No. 128
      requires the presentation of both Basic EPS and Diluted EPS on the face of
      the consolidated statements of income.

      A reconciliation between the numerators and denominators of the Basic and
      Diluted EPS computations for earnings is as follows (in thousands except
      per share data) (Information reflects the stock dividend and stock split
      as described in Note 1):



                                               Three months ended March 31, 2005
                                           -----------------------------------------
                                            Net Income       Shares       Per Share
                                           (numerator)   (denominator)     Amounts
                                           -----------   -------------   -----------
                                                                
BASIC EPS
Net income attributable to common stock    $     1,013       8,577       $      0.12

EFFECT OF DILUTIVE SECURITIES
Options                                    $         -         479              0.01
                                           -----------       -----       -----------

DILUTED EPS
Net income attributable to common stock
    and assumed option exercises           $     1,013       9,056       $      0.11
                                           ===========       =====       ===========


No options to purchase shares of common stock in the three months ended March
31, 2005 were excluded in the computation of Diluted EPS because no option
prices were in excess of the average market price for the three months ended
March 31, 2005.



                                               Three months ended March 31, 2004
                                           -----------------------------------------
                                            Net Income       Shares       Per Share
                                           (numerator)   (denominator)     Amounts
                                           -----------   -------------   -----------
                                                                
BASIC EPS
Net income attributable to common stock    $       734       8,048       $      0.09

EFFECT OF DILUTIVE SECURITIES
Options                                    $         -         289                 -
                                           -----------       -----       -----------

DILUTED EPS
Net income attributable to common stock
    and assumed option exercises           $       734       8,337       $      0.09
                                           ===========       =====       ===========


Options to purchase 10,000 shares of common stock in the three months ended
March 31, 2004 were not included in the computation of Diluted EPS because the
option price was in excess of the average market price for the three months
ended March 31, 2004. These options were still outstanding at the end of the
period.



                                               Nine months ended March 31, 2005
                                           -----------------------------------------
                                            Net Income       Shares       Per Share
                                           (numerator)   (denominator)     Amounts
                                           -----------   -------------   -----------
                                                                
BASIC EPS
Net income attributable to common stock    $     2,398       8,536       $      0.28

EFFECT OF DILUTIVE SECURITIES
Options                                    $         -         440              0.01
                                           -----------       -----       -----------

DILUTED EPS
Net income attributable to common stock
    and assumed option exercises           $     2,398       8,976       $      0.27
                                           ===========       =====       ===========


No options to purchase shares of common stock in the nine months ended March 31,
2005 were excluded in the computation of Diluted EPS because no option prices
were in excess of the average market price for the nine months ended March 31,
2005.

                                       10




                                                Nine months ended March 31, 2004
                                           -----------------------------------------
                                            Net Income       Shares       Per Share
                                           (numerator)   (denominator)     Amounts
                                           -----------   -------------   -----------
                                                                
BASIC EPS
Net income attributable to common stock    $     1,180       7,866       $      0.15

EFFECT OF DILUTIVE SECURITIES
Options                                    $         -         260                 -
                                           -----------       -----       -----------

DILUTED EPS
Net income attributable to common stock
    and assumed option exercises           $    1,180        8,126       $      0.15
                                           ===========       =====       ===========


Options to purchase 60,800 shares of common stock in the nine months ended March
31, 2004 were not included in the computation of Diluted EPS because the option
price was in excess of the average market price for the nine months ended March
31, 2004. These options were still outstanding at the end of the period.

5) Long Term Debt

      In May 2001, the Company amended its secured revolving credit agreement
      with its primary bank. The Company's borrowing capacity under the amended
      agreement was increased to $18,000,000. The amended revolving credit
      agreement is secured by all the accounts receivable, inventory, the
      Company's headquarters in Amityville, New York, common stock of three of
      the Company's subsidiaries and certain other assets of Napco Security
      Systems, Inc. The revolving credit agreement bears interest at either the
      Prime Rate less 1/4% or an alternate rate based on LIBOR as described in
      the agreement. The agreement contains various restrictions and covenants
      including, among others, restrictions on payment of dividends,
      restrictions on borrowings, restrictions on capital expenditures, the
      maintenance of minimum amounts of tangible net worth, and compliance with
      other certain financial ratios, as defined in the agreement. In October
      2004 the Company renegotiated this secured revolving credit agreement at
      essentially the same terms and conditions with a new expiration date of
      September 2008. In December 2004, the Company utilized a portion of this
      revolving credit agreement to accelerate full repayment of its two term
      loans, aggregating $1,658,000, which were outstanding at the beginning of
      the quarter ended December 31, 2004.

6.) Geographical Data

      The revenues attributable to the Company's domestic and foreign operations
      for the periods presented are summarized in the following tabulation (in
      thousands):



                                       Three Months            Nine Months
                                      Ended March 31,         Ended March 31,
                                   --------------------   ----------------------
                                     2005        2004        2005        2004
                                   --------   ---------   ---------   ----------
                                                          
Sales to external customers (1):
    Domestic                       $ 13,045   $  12,604   $  37,614   $   32,615
    Foreign                           2,698       2,138       7,588        6,591
                                   --------   ---------   ---------   ----------

    Total Net Sales                $ 15,743   $  14,742   $  45,202   $   39,206
                                   ========   =========   =========   ==========


(1) All of the Company's sales occur in the United States and are shipped
    primarily from the Company's facilities in the United States and United
    Kingdom. There were no sales into any one foreign country in excess of 10%
    of Net Sales.

                                       11


7) Commitments and Contingencies

      In August 2001, the Company became a defendant in a product related
      lawsuit, in which the plaintiff seeks damages of approximately
      $17,000,000. This action is being defended by the Company's insurance
      company on behalf of the Company. Management believes that the action is
      without merit and plans to have this action vigorously defended.

      In the normal course of business, the Company is a party to claims and/or
      litigation. Management believes that the settlement of such claims and/or
      litigation, considered in the aggregate, will not have a material adverse
      effect on the Company's financial position and results of operations.

                                       12


Item 2. Management's Discussion and Analysis of Financial Condition and Results
of Operations

Napco Security Systems, Inc.
Management's Discussion and Analysis of Financial Condition and Results of
Operations

This Quarterly Report on Form 10-Q and the information incorporated by reference
may include "Forward-Looking Statements" within the meaning of Section 27A of
the Securities Act of 1933 and Section 21E of the Exchange Act of 1934. The
Company intends the Forward-Looking Statements to be covered by the Safe Harbor
Provisions for Forward-Looking Statements. All statements regarding the
Company's expected financial position and operating results, its business
strategy, its financing plans and the outcome of any contingencies are
Forward-Looking Statements. The Forward-Looking Statements are based on current
estimates and projections about our industry and our business. Words such as
"anticipates," "expects," "intends," "plans," "believes," "seeks," "estimates,"
or variations of such words and similar expressions are intended to identify
such Forward-Looking Statements. The Forward-Looking Statements are subject to
risks and uncertainties that could cause actual results to differ materially
from those set forth or implied by any Forward-Looking Statements. Factors that
could cause actual results to differ materially from the Forward-Looking
Statements include, but are not limited to, inability to refinance, adverse tax
consequences of offshore operations, distribution problems, unforeseen
environmental liabilities and the uncertain military, political and economic
conditions in the world. The Company assumes no obligation to update publicly
the Forward-Looking Statements contained herein, whether as a result of new
information, future events or otherwise, except as may be required by law.

Overview

The Company is a diversified manufacturer of security products, encompassing
intrusion and fire alarms, building access control systems and electronic
locking devices. These products are used for commercial, residential,
institutional, industrial and governmental applications, and are sold in 44
countries principally to independent distributors, dealers and installers of
security equipment. International sales account for approximately 16.3% of our
revenues for fiscal year 2004.

The Company owns and operates manufacturing facilities in Amityville, New York
and the Dominican Republic. A significant portion of our operating costs are
fixed, and do not fluctuate with changes in customer demand or utilization of
our manufacturing capacity. As product demand rises and factory utilization
increases, the fixed costs are spread over increased output, which should
improve profit margins. Conversely, when sales decline our fixed costs are
spread over reduced levels, thereby decreasing margins.

In February 2004 the Company entered into a joint venture with an unrelated
company to sell security-related products, including those manufactured by the
Company, in the Middle East. The Company owns 51% of the newly formed company,
an LLC organized in New York, which has its main operations in the United Arab
Emirates. To date, revenues generated by this joint venture have been
immaterial.

The security market is characterized by constant incremental innovation in
product design and manufacturing technologies. Generally, the Company devotes
7-8% of revenues to research and development (R&D) on an annual basis. Products
resulting from our R&D investments in fiscal 2005 did not contribute materially
to revenue during this fiscal year, but should benefit the Company over future
years. In general, the new products introduced by the Company are initially
shipped in limited quantities, and increase over time. Prices and manufacturing
costs tend to decline over time as products and technologies mature.

Economic and Other Factors

It has been estimated that the worldwide security market's current size exceeds
$25 billion and is expanding at a rate of 5% to 8% per year. The public's
general view is the world has become a riskier place to live, work and do
business. Electronic security systems of all kinds have become even more
necessary and part of the "fabric of life". The post September 11 era has
generally been characterized by a favorable business climate for suppliers of
electronic security products and services versus the rather sluggish performance
of most technology related sectors during the similar period. Electronic
security vendors, however, did not completely escape the fallout from the
broader downturn in capital spending in the economy. The Company believes the
security equipment market is likely to continue to exhibit healthy growth,
particularly in industrial sectors, due to ongoing concerns over the adequacy of
security safeguards.

Seasonality

The Company's fiscal year begins on July 1 and ends on June 30. Historically,
the end users of Napco's products want to install its products prior to the
summer; therefore sales of its products peak in the period April 1 through June
30, the Company's fiscal fourth quarter, and are reduced in the period July 1
through September 30, the Company's fiscal first quarter. To a lesser degree,
sales in Europe are also adversely impacted in the period July 1 through
September 30 because of European vacation patterns, i.e., many distributors and
installers are closed for the month of August.

Critical Accounting Policies

                                       13



The Company's consolidated financial statements have been prepared in conformity
with accounting principles generally accepted in the United States of America
which require, in some cases, that certain estimates and assumptions be made
that affect the amounts and disclosures reported in the those financial
statements and the related accompanying notes. Estimates are based on current
facts and circumstances, prior experience and other assumptions believed to be
reasonable. Management uses its best judgment in valuing these estimates and
may, as warranted, solicit external advice. Actual results could differ from
these estimates, assumptions and judgments and these differences could be
material. The following critical accounting policies, some of which are impacted
significantly by estimates, assumptions and judgments, affect the Company's
consolidated financial statements. Our most critical accounting policies relate
to revenue recognition; concentration of credit risk; inventory; goodwill and
other intangible assets; and income taxes.

Revenue Recognition

Revenues from merchandise sales are recorded at the time the product is shipped
or delivered to the customer pursuant to the terms of purchase. We report our
sales levels on a net sales basis, which is computed by deducting from gross
sales the amount of actual returns received and an amount established for
anticipated returns and allowances.

Our sales return accrual is a subjective critical estimate that has a direct
impact on reported net sales. This accrual is calculated based on a history of
gross sales and actual sales returns, as well as management's estimate of
anticipated returns and allowances.

Business Concentration and Credit Risk

An entity is more vulnerable to concentrations of credit risk if it is exposed
to risk of loss greater than it would have had it mitigated its risk through
diversification of customers. Such risks of loss are manifest differently,
depending on the nature of the concentration, and vary in significance. The
Company has two major customers with Sales and Accounts receivable as follows
(in thousands):



                           Sales for the three months ended March 31,
                         ----------------------------------------------
                          2005                       2004
                            $            %             $            %
                         -------       -----       --------       -----
                                                      
Customer A                 1,353           8%         1,329           9%
Customer B                 1,374           9%         1,123           8%
                         -------       -----       --------       -----
                           2,727          17%         2,452          17%
                         =======       =====       ========       =====




                            Sales for the nine months ended March 31,
                         ----------------------------------------------
                          2005                       2004
                            $            %             $              %
                         -------       -----       --------       -----
                                                      
Customer A                 3,452           7%         2,903           7%
Customer B                 3,945           9%         2,334           6%
                         -------       -----       --------       -----
                           7,397          16%         5,237          13%
                         =======       =====       ========       =====




                                   Accounts Receivable as of:
                        -----------------------------------------------
                        March 31,                  June 30,
                           2005                     2004
                            $            %            $             %
                        ---------      -----       --------       -----
                                                      
Customer A                 4,599          26%         4,197          21%
Customer B                 2,570          15%         2,071          10%
                         -------       -----       --------       -----
                           7,169          41%         6,268          31%
                         =======       =====       ========       =====


                                       14



These customers sell primarily within North America. Although management
believes that these customers are sound and creditworthy, a severe adverse
impact on their business operations could have a corresponding material adverse
effect on our net sales, cash flows, and/or financial condition. In the ordinary
course of business, we have established an allowance for doubtful accounts and
customer deductions in the amount of $320,000 and $355,000 as of March 31, 2005
and June 30, 2004, respectively. Our allowance for doubtful accounts is a
subjective critical estimate that has a direct impact on reported net earnings.
This reserve is based upon the evaluation of accounts receivable aging, specific
exposures and historical trends.

Inventories

We state our inventory at the lower of cost or fair market value, with cost
being determined on the first-in, first-out (FIFO) method. We believe FIFO most
closely matches the flow of our products from manufacture through sale. The
reported net value of our inventory includes finished saleable products,
work-in-process and raw materials that will be sold or used in future periods.
Inventory cost includes raw materials, direct labor and overhead.

We also record an inventory obsolescence reserve, which represents the
difference between the cost of the inventory and its estimated fair market
value, based on various product sales projections. This reserve is calculated
using an estimated obsolescence percentage based on age, historical trends and
requirements to support forecasted sales. In addition, and as necessary, we may
establish specific inventory obsolescence reserves for known or anticipated
events. For interim financial statements, inventories are calculated using a
gross profit percentage.

Goodwill and Other Intangible Assets

Goodwill is calculated as the excess of the cost of purchased businesses over
the value of their underlying net assets. Goodwill is not amortized. Other
intangible assets are not material.

On an annual basis, we test goodwill for impairment. To determine the fair value
of these intangible assets, there are many assumptions and estimates we choose.
To mitigate undue influence, we use industry accepted valuation models and set
criteria that are reviewed and approved by various levels of management. We
evaluate our recorded goodwill with the assistance of a third-party valuation
firm.

Income taxes

We have accounted for, and currently account for, income taxes in accordance
with SFAS No. 109, "Accounting for Income Taxes". This statement establishes
financial accounting and reporting standards for the effects of income taxes
that result from an enterprise's activities during the current and preceding
years. It requires an asset and liability approach for financial accounting and
reporting of income taxes.

Stock Dividend

In November 2004, the Company's Board of Directors approved a twenty percent
(20%) stock dividend of the Company's common stock payable to stockholders of
record on November 22, 2004. The additional shares were distributed on December
6, 2004. The effect of the stock dividend has been retroactively reflected in
all share and per share data. As a result, all references to numbers of shares
have been increased by 20%, and there has been a corresponding decrease to all
per share amounts, throughout this entire document for all periods presented.
This resulted in a reduction in earnings per share due to the increase in the
weighted average number of shares outstanding as a result of the 20% stock
dividend. Retroactive adjustment to all share and per share data is necessary to
assure such information is comparable for all periods presented. There is no net
effect on total stockholders' equity as a result of the stock dividend.

                                       15



The following table shows the effect of retroactively reflecting this 20% stock
dividend on earnings per share for the three and nine months ended March 31,
2004 (in thousands except share and per share data):



                                                                                 Three months ended     Nine months ended
                                                                                   March 31, 2004         March 31, 2004
                                                                                 ------------------     -----------------
                                                                                                  
Net income                                                                         $          734         $        1,180

Earnings per share before retroactive effect of 20% stock dividend:
      Basic                                                                        $         0.11         $         0.18
      Diluted                                                                      $         0.11         $         0.17
Weighted average number of shares outstanding before retroactive effect of 20%
stock dividend:
      Basic                                                                             6,706,752              6,555,282
      Diluted                                                                           6,947,574              6,772,018
Earnings per share as reported (after giving effect of 20% stock dividend):
      Basic                                                                        $         0.09         $         0.15
      Diluted                                                                      $         0.09         $         0.15
Weighted average number of shares outstanding as reported (after giving effect
of 20% stock dividend):
      Basic                                                                             8,048,102              7,866,338
                                                                                        8,337,089              8,126,422


Results of Operations



                                             Three months ended March 31,             Nine months ended March 31,
                                          ------------------------------------    ----------------------------------
                                                                   % Increase/                           % Increase/
                                              2005         2004     (decrease)       2005        2004    (decrease)
                                          ----------   ----------  -----------    ----------   --------  -----------
                                                                                       
Net sales                                 $   15,743   $   14,742            7%   $   45,202   $ 39,206           15%
Gross profit                                   5,096        4,622           10%       14,287     12,157           18%
Gross profit as a % of net sales                32.4%        31.4%         1.0%         31.6%      31.0%         0.6%
Selling, general and administrative            3,423        3,363            2%       10,263      9,945            3%
Income from operations                         1,673        1,259           33%        4,024      2,212           82%
Interest expense                                  50          101          (50)%         176        331          (47)%
Other expense                                     72           30          140%          170         66          158%
Provision for income taxes                       538          394           37%        1,280        635          102%
Net income                                     1,013          734           38%        2,398      1,180          103%


Sales for the three months ended March 31, 2005 increased by 7% to $15,743,000
as compared to $14,742,000 for the same period a year ago. Sales for the nine
months ended March 31, 2005 increased by 15% to $45,202,000 as compared to
$39,206,000 for the same period a year ago. The increase in sales for the third
quarter was across all product lines which are intrusion and fire alarms,
locking devices and access control systems. The increase in net sales for the
nine months ended March 31, 2005 was primarily due to increased sales of the
Company's intrusion alarm products. Sales in the first two fiscal quarters of
fiscal 2004 were adversely affected by a major distributor's introduction of its
company-wide inventory reduction program. During the quarter ended December 31,
2003, the Company began the process of realigning its intrusion alarm products
distribution network, which culminated in the termination of the aforementioned
major alarm distributor. The Company reallocated its intrusion alarm products
business across its extensive national network of independent distributors.
Management believes that this realignment of its distribution network resulted
in

                                       16


increased sales during the first two quarters of fiscal 2005 and, to a lesser
extent, in the third quarter of fiscal 2005 as the reallocation took hold.

The Company's gross profit for the three months ended March 31, 2005 increased
by $474,000 to $5,096,000 or 32.4% of sales as compared to $4,622,000 or 31.4%
of sales for the same period a year ago. Gross profit for the nine months ended
March 31, 2005 increased by $2,130,000 to $14,287,000 or 31.6% of sales as
compared to $12,157,000 or 31.0% of sales for the same period a year ago. The
increase in dollars was due primarily to the increase in sales as discussed
above. During the three and nine months ended March 31, 2005, gross profit as a
percentage of sales was positively affected by more efficient overhead
absorption due to the increase in sales described above as partially offset by
an unfavorable change in the foreign currency exchange rate relating to the
Company's Dominican Republic manufacturing facility.

Selling, general and administrative expenses for the three months ended March
31, 2005 increased by $60,000 to $3,423,000, or 21.7% of sales, as compared to
$3,363,000, or 22.8% of sales a year ago. Selling, general and administrative
expenses for the nine months ended March 31, 2005 increased by $318,000 to
$10,263,000, or 22.7% of sales, as compared to $9,945,000, or 25.4% of sales a
year ago. The increase in dollars and the decline in selling, general and
administrative expenses as a percentage of sales for the three and nine months
ended March 31, 2005 were due primarily to net sales increasing as described
above while non-variable expenses remained relatively constant.

Interest expense, net for the three months ended March 31, 2005 decreased by
$51,000 to $50,000 from $101,000 for the same period a year ago. Interest
expense, net for the nine months ended March 31, 2005 decreased by $155,000 to
$176,000 from $331,000 for the same period a year ago. The decreases for the
three and nine months resulted primarily from the reduction in the Company's
average outstanding debt as discussed below.

Other expenses, net for the three months ended March 31, 2005 increased by
$42,000 to $72,000 as compared to the same period a year ago. Other expense, net
for the nine months ended March 31, 2005 increased by $104,000 to $170,000 as
compared to the same period a year ago. This increases resulted primarily from
expenses related to the Company's joint venture in the Middle East, which was
formed in February of 2004.

The Company's provision for income taxes for the three months ended March 31,
2005 increased by $144,000 to $538,000 as compared to $394,000 for the same
period a year ago. Provision for income taxes for the nine months ended March
31, 2005 increased by $645,000 to $1,280,000 as compared to $635,000 for the
same period a year ago. The tax provisions are calculated using an estimated
effective tax rate of 35%. The increases in provision for income taxes resulted
from the increase in Income before income tax, which resulted primarily from the
aforementioned increase in net sales and gross profit.

Net income increased by $279,000 to $1,013,000 or $0.12 per share for the three
months ended March 31, 2005 as compared to $734,000 or $0.09 per share for the
same period a year ago. For the nine months ended March 31, 2005 net income
increased by $1,218,000 to $2,398,000 or $0.28 per share as compared to
$1,180,000 or $0.15 per share for the same period a year ago. The effect of the
20% stock dividend discussed above has been retroactively reflected in all per
share data. These increases were primarily due to the aforementioned increases
in net sales and gross profit, net of the related increase in provision for
income taxes.

Liquidity and Capital Resources

During the nine months ended March 31, 2005 the Company utilized a portion of
its cash generated from operations to reduce certain of its outstanding
borrowings (by $5,387,000), purchase property, plant and equipment ($548,000)
and invest in additional inventory ($638,000) as discussed below. The Company's
management believes that current working capital, cash flows from operations and
its revolving credit agreement will be sufficient to fund the Company's
operations through at least the third quarter of fiscal 2006.

Accounts Receivable at March 31, 2005 decreased $2,340,000 to $17,587,000 as
compared to $19,927,000 at June 30, 2004. This decrease is primarily the result
of the higher sales volume during the quarter ended June 30, 2004 as compared to
the quarter ended March 31, 2005.

Inventory at March 31, 2005 increased by $638,000 to $15,232,000 as compared to
$14,594,000 at June 30, 2004. This increase was primarily the result of the
Company's level-loading its production schedule in anticipation of its
historical sales cycle where a larger portion of the Company's sales occur in
the latter fiscal quarters as compared to the earlier quarters.

As of March 31, 2005, the Company's credit facilities consist of an $18,000,000
secured revolving credit agreement. In April 2004 the Company's bank approved an
extension of the expiration date of the secured revolving credit agreement from
January 2005 to April 2005. In October 2004 the Company renegotiated this
secured revolving credit agreement at essentially the same terms and conditions
with a new expiration date of September 2008. In December 2004, the Company
utilized a portion of this revolving credit

                                       17


agreement to accelerate repayment of two term loans aggregating $1,658,000 As of
March 31, 2005 there was approximately $15,100,000 available under the secured
revolving credit facility.

As of March 31, 2005 the Company had no material commitments for capital
expenditures or inventory purchases other than purchase orders used in the
normal course of business.

ITEM 3: Quantitative and Qualitative Disclosures About Market Risk

The Company's principal financial instrument is long-term debt consisting of a
revolving credit and term loan facility that provides for interest at a spread
above the prime rate. The Company is affected by market risk exposure primarily
through the effect of changes in interest rates on amounts payable by the
Company under this credit facility. At March 31, 2005 an aggregate amount of
approximately $2,900,000 was outstanding under this facility. If these
borrowings remained at this quarter-end level for an entire year and the prime
rate increased or decreased, respectively, by 1% the Company would pay or save,
respectively, an additional $29,000 in interest that year.

Where appropriate, the Company requires that letters of credit be provided on
foreign sales. In addition, a significant number of transactions by the Company
are denominated in U.S. dollars. As such, the Company has shifted foreign
currency exposure onto many of its foreign customers. As a result, if exchange
rates move against foreign customers, the Company could experience difficulty
collecting unsecured accounts receivable, the cancellation of existing orders or
the loss of future orders. The foregoing could materially adversely affect the
Company's business, financial condition and results of operations. In addition,
the Company transacts certain sales in Europe in British Pounds Sterling,
therefore exposing itself to a certain amount of foreign currency risk.
Management believes that the amount of this exposure is immaterial. We are also
exposed to foreign currency risk relative to the Dominican Peso ("RD$"), the
local currency of the Company's production facility in the Dominican Republic.
The result of a 10% strengthening in the U.S. dollar to our RD$ expenses would
result in an annual decrease in income from operations of approximately
$260,000.

ITEM 4: Controls and Procedures

At the end of the period covered by this report, the Company carried out an
evaluation, under the supervision and with the participation of the Company's
management, including the Company's Chief Executive Officer and Chief Financial
Officer, of the Company's disclosure controls and procedures pursuant to
Exchange Act Rule 13 a - 15(e). Based upon that evaluation, the Chief Executive
Officer and Chief Financial Officer concluded that the Company's disclosure
controls and procedures are effective. During the third quarter of fiscal year
2005, there were no changes in the Company's internal control over financial
reporting that have materially affected, or are reasonable likely to materially
affect, the Company's internal control over financial reporting.

PART II: OTHER INFORMATION

Item 6. Exhibits

           31.1 Certification Pursuant to Rule 13a-14(a)/15d-14(a) of Richard L.
                Soloway, Chairman of the Board and President

           31.2 Certification Pursuant to Rule 13a-14(a)/15d-14(a) of Kevin S.
                Buchel, Senior Vice President of Operations and Finance

           32.1 Section 1350 Certifications

                                       18


                                   SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the
registrant has duly caused this report to be signed on its behalf by the
undersigned thereunto duly authorized.

May 12, 2005

                           NAPCO SECURITY SYSTEMS, INC
                                  (Registrant)

By: /s/ Richard L. Soloway
    -------------------------------------------------------------------
    Richard L. Soloway
    Chairman of the Board of Directors, President and Secretary
    (Chief Executive Officer)

By: /s/ Kevin S. Buchel
    -------------------------------------------------------------------
    Kevin S. Buchel
    Senior Vice President of Operations and Finance and Treasurer
    (Principal Financial and Accounting Officer)

                                       19