EXHIBIT 23.1

INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM'S CONSENT
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We consent to the incorporation by reference in the Registration Statement of
NAPCO Security Systems, Inc. on Form S-8 [File No. 333-14743] of our report
dated September 12, 2007, with respect to our audits of the consolidated
financial statements and related consolidated financial statement schedule of
NAPCO Security Systems, Inc. as of June 30, 2007 and 2006 and for the years
ended June 30, 2007, 2006 and 2005 and our report dated September 12, 2007 with
respect to our audit of the effectiveness of internal control over financial
reporting of NAPCO Security Systems, Inc. as of June 30, 2007, which reports are
included in this Annual Report on Form 10-K of NAPCO Security Systems, Inc. for
the year ended June 30, 2007.

Our report on the effectiveness of internal control over financial reporting
expressed an adverse opinion because of the existence of material weaknesses.

/s/ Marcum & Kliegman LLP

Marcum & Kliegman LLP
Melville, New York
September 27, 2007