SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549


                                    FORM 8-K


               CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF
                      THE SECURITIES EXCHANGE ACT OF 1934



     DATE OF REPORT (DATE OF EARLIEST EVENT REPORTED):   November 27, 1996
                                                         -----------------


                              GREATER BAY BANCORP
                              -------------------
             (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)

   California                      0-25034                        77-0387041
- ------------------               -----------                 ------------------
(STATE OR OTHER                  (COMMISSION                    (IRS EMPLOYER
JURISDICTION OF                  FILE NUMBER)                IDENTIFICATION NO.)
INCORPORATION)


                    2860 West Bayshore, Palo Alto, CA  94303
                    ----------------------------------------
             (ADDRESS OF PRINCIPAL EXECUTIVE OFFICES AND ZIP CODE)



      REGISTRANT'S TELEPHONE NUMBER, INCLUDING AREA CODE:  (415) 813-8200
                                                           --------------

                              GREATER BAY BANCORP
                               420 Cowper Street
                             Palo Alto, CA  94301
                           -----------------------
         (FORMER NAME OR FORMER ADDRESS, IF CHANGED SINCE LAST REPORT.)

 
ITEM 2.   ACQUISITION OR DISPOSITION OF ASSETS.
 
     (a)     On November 27, 1996, Cupertino National Bancorp ("Cupertino"), a
          California Corporation, and Mid-Peninsula Bancorp, a California
          Corporation ("Mid-Peninsula"), consummated the merger (the "Merger")
          described in that certain Second Amended and Restated Agreement and
          Plan of Reorganization and Merger dated August 20, 1996 (the
          "Agreement"), between Mid-Peninsula and Cupertino.  Pursuant to the
          Agreement: (a) Cupertino was merged with and into Mid-Peninsula; (b)
          Mid-Peninsula, as the surviving corporation, changed its name to
          Greater Bay Bancorp (hereinafter, "Bancorp") and its address to 2860
          West Bayshore Road, Palo Alto, California; and (c) Cupertino's
          corporate existence ceased.  The Merger, which has been treated as a
          pooling of interests for accounting and financial reporting purposes
          in accordance with Accounting Practices Board Opinion No. 16,
          "Business Combinations," became effective on November 27, 1996 (the
          "Effective Time").

             At the Effective Time:  (a) each share of Mid-Peninsula
          Common Stock outstanding immediately prior to the Effective Time
          remained as one outstanding share of Bancorp Common Stock; and (b)
          each share of Cupertino Common Stock outstanding immediately prior to
          the Effective Time was automatically canceled and converted into the
          right to receive .81522 ("Conversion Ratio") shares of Bancorp Common
          Stock.

             In addition, pursuant to the Agreement, each person who held
          options to purchase shares of Cupertino Common Stock pursuant to the
          Cupertino Stock Option Plans ("Cupertino Options") received from
          Bancorp, a substitute option pursuant to the Bancorp 1996 Stock Option
          Plan (the "Bancorp New Option Plan"), exercisable for the number of
          shares of Bancorp Common Stock into which each share of Common Stock
          subject to such unexercised Cupertino Option would have been converted
          if outstanding as of the Effective Time, rounded up to the nearest
          full share (a "Substitute Bancorp Option").  Each Substitute Bancorp
          Option is exercisable at an exercise price determined by dividing the
          exercise price per share of the Cupertino Option by the Conversion
          Ratio, rounded to the nearest cent.  Each Substitute Option is vested
          according to the terms of each individual option agreement and option
          plans and will continue to vest according to the same vesting
          schedule as provided under the original stock option agreements and
          is exercisable as provided in the original stock option agreements.

     (b)     Cupertino National Bank & Trust ("CNB"), a wholly owned
          subsidiary of Cupertino and Mid-Peninsula Bank ("MPB"), a wholly owned
          subsidiary of Mid-Peninsula became subsidiaries of Greater Bay
          Bancorp.  CNB, with headquarters in Cupertino, California, also has an
          office in San Jose and two offices in Palo 

 
          Alto. MPB, with headquarters in Palo Alto, California, also has one
          office each in San Carlos and San Mateo. CNB's trust division has been
          renamed Greater Bay Trust Company and will serve clients of both CNB
          and MPB.


ITEM 7.   FINANCIAL STATEMENTS AND EXHIBITS

     (a)  Financial Statements of Cupertino:
          (1)  The Consolidated Financial Statements as of December 31, 1995 and
               1994 and for each of the years in the three-year period ended
               December 31, 1995 (incorporated by reference from Cupertino's
               Annual Report on Form 10-K for the year ended December 31, 1995
               (File No. 0-18015))

          (2)  Consolidated Financial Statements as of September 30, 1996 and
               for the nine months ended September 30, 1996 and 1995
               (incorporated by reference from Cupertino's Quarterly Report on
               Form 10-Q for the nine months ended September 30, 1996 (File No.
               18015))

     (b)  Pro forma financial information:
          (1)  Mid-Peninsula and Cupertino Unaudited Pro-Forma Combined Balance
               Sheet as of September 30, 1996.

          (2)  Mid-Peninsula and Cupertino Unaudited Pro-Forma Combined Income
               Statement for the nine months ended September 30, 1996.

          (3)  Mid-Peninsula and Cupertino Unaudited Pro-Forma Combined Income
               Statement for the years ended December 31, 1995, 1994 and 1993
               (incorporated by reference from the Proxy Statement dated
               September 25, 1996 of Mid-Peninsula at pages 15 to 17.)

     (c)  Exhibits

               2.1  Seconded Amended and Restated Agreement and Plan of
                    Reorganization and Merger dated as of August 20, 1996
                    between Mid-Peninsula and Cupertino (incorporated by
                    reference from Appendix A in the Company's Registration
                    Statements on Form S-4 (No. 333-10781) dated August 23,
                    1996).

               23   Consent of Independent Accounts for Cupertino National
                    Bancorp

 
                   UNAUDITED PRO FORMA COMBINED BALANCE SHEET
                            AS OF SEPTEMBER 30, 1996
                                 (IN THOUSANDS)


 
                                                                                           MID-PENINSULA &
                                                                                              CUPERTINO   
                                             MID-PENINSULA    CUPERTINO    ADJUSTMENTS        COMBINED    
                                             -------------    ---------   ------------     --------------- 
                                                                               
 
ASSETS
     Cash and due from banks                 $ 11,622         $  20,273       $    --      $ 31,895
     Federal funds sold                        21,000             4,600             -        25,600
     Securities held-to-maturity                6,385            57,895            --        64,280
     Securities available-for-sale             53,995             1,002            --        54,997
     FRB and FHLB stock                           430             1,021            --         1,451
     Loans, net                               159,861           220,882            --       380,743
     Premises and equipment                       981             3,186            --         4,167
     Other assets                               5,579            10,696            --        16,275
                                             --------         ---------       -------      --------
 
      TOTAL ASSETS                           $259,853         $ 319,555       $    --      $579,408
                                             ========         =========       =======      ========
 
LIABILITIES
     Deposits                                $234,137          $294,902       $    --      $529,039
     Subordinated debt                             --             3,000            --         3,000
     Other liabilities                          1,683               865         2,791(1)      5,339
                                             --------         ---------       -------      --------
 
TOTAL LIABILITIES                             235,820           298,767         2,791       537,378
SHAREHOLDERS' EQUITY                           24,033            20,788        (2,791)       42,030
                                             --------         ---------       -------      --------
 
      TOTAL LIABILITIES AND
      SHAREHOLDERS'
      EQUITY                                 $259,853         $ 319,555       $    --      $579,408
                                             ========         =========       =======      ========


(1) The following table reflects all nonrecurring Mid-Peninsula and Cupertino
    estimated merger and restructuring related costs as of September 30, 1996.
    These costs are not included in the Unaudited Pro Forma Combined Income
    Statement but are included in the Unaudited Pro Forma Combined Balance Sheet
    as a reduction to equity capital. These costs will be charged to expense
    immediately following the consummation of the Merger. Such estimated merger
    and restructuring related costs are summarized below (in thousands):


 
                                    Mid-Peninsula   Cupertino   Combined
                                    -------------   ---------   --------
                                                       
 
Financial Advisory                         $  208      $  328     $  536
Professional fees and printing                358         210        568
Other                                         905         782      1,687
                                           ------      ------     ------
 
     Total                                 $1,471      $1,320     $2,791
                                           ======      ======     ======


 
                  UNAUDITED PRO FORMA COMBINED INCOME STATEMENT
                  FOR THE NINE MONTHS ENDED SEPTEMBER 30, 1996
                                 (IN THOUSANDS)


 
                                                                                           MID-PENINSULA &
                                                                                              CUPERTINO
                                           MID-PENINSULA         CUPERTINO   ADJUSTMENTS       COMBINED
                                           -------------         ---------   -----------   ----------------
                                                                               
 
Interest and fees on loans and leases            $10,845          $ 14,626        $   --         $25,471
Interest on investment securities                  2,241             2,688            --           4,929
Interest on federal funds sold/
  other interest income                            1,172               336            --           1,508
                                                 -------          --------                       -------
 
TOTAL INTEREST INCOME                             14,258            17,650            --          31,908
 
Interest on deposits                               5,380             6,163            --          11,543
                                                 -------          --------                       -------
Net interest income                                8,878            11,487            --          20,365
Provision for loan loss                              427               864            --           1,291
                                                 -------          --------       -------         -------
Net interest income after
  provision for loan loss                          8,451            10,623            --          19,074
Non interest income                                  324             2,263            --           2,587
Non interest expnese                               4,696            10,395            --          15,091
                                                 -------          --------                       -------
Income before taxes                                4,079             2,491            --           6,570
Taxes on income                                    1,706               943            --           2,649
                                                 -------          --------       -------         -------
NET INCOME                                       $ 2,373          $  1,548        $   --         $ 3,921
                                                 =======          ========       =======         =======
 
Earnings per share                               $  1.44          $   0.76                       $  1.05

Weighted average shares outstanding                1,652             2,029                    3,721


 
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 hereunto duly authorized.


                                         GREATER BAY BANCORP



Date:  March 5, 1997                     /s/ Steven C. Smith
                                         -------------------
                                         Steven C. Smith
                                         Executive Vice President
                                         Chief Operating Officer and
                                         Chief Financial Officer

 
                                 EXHIBIT INDEX


Exhibit No.              Item                                            Page
- -----------              ----                                            ----

2.1     Seconded Amended and Restated Agreement and Plan of 
        Reorganization and Merger dated as of August 20, 1996 
        between Mid-Peninsula and Cupertino (incorporated by 
        reference from Appendix A in the Company's Registration 
        Statements on Form S-4 (No. 333-10781) dated August 23, 1996).

23      Consent of Independent Accounts for Cupertino National Bancorp.