EXHIBIT 99.1


                      [MID-PENINSULA BANCORP LETTERHEAD]


                                 PRESS RELEASE


    For Immediate Release                   For Information Contact
    ---------------------                   -----------------------
        JUNE 6, 1996                        DAVID L. KALKBRENNER, PRESIDENT 
                                            CAROL H. ROWLAND, CFO 
                                            (415) 323-5150


                          MID-PENINSULA BANCORP AND 
                     CUPERTINO NATIONAL BANCORP TO MERGE



PALO ALTO, Calif. -- Mid-Peninsula Bancorp (Nasdaq Bulletin Board: MPBK), 
Palo Alto, CA and Cupertino National Bancorp (Nasdaq: CUNB), Cupertino, CA 
announced today the signing of a definitive agreement for a "merger of 
equals" between the two companies.  The merger will result in the formation 
of the largest multi-bank holding company based in the San Francisco 
Peninsula/South Bay region, and the third-largest publicly traded 
independent bank holding company in the San Francisco Bay area, with total 
assets of approximately $500 million and equity of over $40 million.  The 
resulting entity will be named Greater Bay Bancorp.  Mid-Peninsula Bank and 
Cupertino National Bank & Trust will operate as wholly owned subsidiaries of 
Greater Bay Bancorp and will focus on serving the greater Bay area, 
including the Peninsula and South Bay markets, through their seven office 
locations.

The terms of the agreement provide for Cupertino National Bancorp 
shareholders to receive .81522 of a share of Mid-Peninsula Bancorp stock for 
each share of Cupertino National Bancorp in a tax-free exchange to be 
accounted for as a "pooling-of-interests."  As part of the agreement, 
Mid-Peninsula will list its shares on the Nasdaq National Market System, 
and, concurrent with closing, will be renamed Greater Bay Bancorp.  
Following the merger, the shareholders of Mid-Peninsula Bancorp will own 
approximately 51% of the combined company and the shareholders of Cupertino 
National Bancorp will own approximately 49% of the combined company, giving 
effect to all outstanding options.  

The transaction is anticipated to be accretive in 1997 to shareholders of 
both companies, based on reductions in duplicative administrative functions 
and revenue enhancements resulting from an expanded product line and 
increased lending capacity.  Management of the organizations believe that 
significant opportunities exist to enhance the spectrum of financial 
services offered to both existing and potential clients.  

                                                         (SEE REVERSE)


Greater Bay Bancorp's new Board of Directors will consist of five directors 
from each company, with Duncan L. Matteson (Chairman of Mid-Peninsula 
Bancorp) and John M. Gatto (Chairman of Cupertino National Bancorp) serving 
as co-Chairmen.  David L. Kalkbrenner, who will serve as President and Chief 
Executive Officer of the holding company, will continue as President and 
Chief Executive Officer of Mid-Peninsula Bank, and C. Donald Allen will 
remain as Chairman and Chief Executive Officer of Cupertino National Bank & 
Trust.  Steven C. Smith, the Chief Operating Officer of Cupertino National 
Bancorp, will serve as Chief Operating Officer and Chief Financial Officer 
of the holding company.  

The adoption of the multi-bank holding company format will facilitate the 
addition of other independent banks to the organization and permits the 
preservation of the personalized relationship banking philosophy espoused by 
community banking organizations.  "The combination of these two successful 
institutions presents significant benefits for our clients, employees and 
shareholders," commented David Kalkbrenner.  "This is a rare opportunity to 
create one of the largest locally based community bank franchises servicing 
the needs of the business and venture community in the greater Bay area.  
The complementary nature of our business philosophies, services provided and 
markets will position our company for continued growth and profitability.  
The unique fit offered by the services Cupertino National Bank has 
developed, particularly trust services, will provide the opportunity and 
resources necessary to expand and enhance the profitability of our core 
banking business as well as increase opportunities to provide financial 
services not previously available to our clients.  Mid-Peninsula's 
historical cost-efficiency, combined with the wide breadth of services 
offered by Cupertino National, will enable the combined organization to 
provide, on a more cost-effective basis, a wider range of services to an 
expanded client base." 

Cupertino National Bancorp President and Chief Executive Officer Don Allen 
commented, "The thrust of Cupertino National Bank & Trust has focused on 
providing specific niche services that fit with its vision of becoming a 
significant force throughout the Bay Area.  The combination of our two banks 
will preserve this focus and assure that significantly greater resources are 
available for this effort. As a competitor, we have admired Mid-Peninsula 
Bank's stellar performance for some time; we look forward to a combined 
focus on providing the best client services available anywhere.  The ability 
to leverage the investment Cupertino National has made in its Trust and 
Venture Lending units through the strong client relationships enjoyed by 
Mid-Peninsula is expected to yield immediate incremental income.  
Additionally, the combined strength of our organization will enable 
Cupertino National's Venture Lending unit to compete more aggressively in 
the technology, life sciences and emerging growth industries, as a result of 
increased lending limits and additional resources."

In connection with the merger agreement, Mid-Peninsula and Cupertino will 
grant each other options to purchase up to 19.0% of the outstanding shares 
of each other's common stock under certain circumstances in the event the 
transaction is terminated.  The merger is expected to be completed in the 
fourth quarter of 1996, subject to shareholder and regulatory approvals.  

Mid-Peninsula Bancorp had $233.0 million in assets, $209.2 million in 
deposits and $22.0 million in shareholders' equity as of March 31, 1996.  
Cupertino National Bancorp had $255.0 million in assets, $231.8 million in 
deposits and $19.4 million in shareholders' equity as of that date.

                                     ###



                        COMBINED SUMMARY FINANCIALS
                (DOLLARS IN THOUSANDS, EXCEPT PER SHARE DATA)

                               MARCH 31, 1996

                                            MPBK       CUNB      COMBINED(1)
                                          --------   --------   -------------
Total Assets                              $232,989   $254,960      $487,949
Total Loans                                136,280    174,505       310,785
Total Deposits                             209,210    231,830       441,040
Shareholders' Equity                        21,983     19,410        41,393

Equity/Assets                                9.44%      7.61%         8.48%
Tier I Risk-Based Capital Ratio             13.33%      9.14%        10.96%
Total Risk-Based Capital Ratio              14.46%     11.80%        12.60%
Leverage Ratio                               9.86%      7.50%         8.59%
Non-Performing Assets                            0      3,422         3,422
Loan Loss Allowance/Non-Performing 
  Loans                                         NM     90.70%        148.0%

F.D. Common Shares Outstanding (2)(3)    1,886,981  2,223,929     3,699,972(4)
F.D. Book Value/Share (2)(3)                $13.55      $9.94        $12.88
Market Capitalization (2)(5)               $33,375    $25,885           ---

No. of Offices                                   3          4             7

- ----------------------------
(1) Combined information does not reflect any merger-related expenses.
(2) Based on shares outstanding as of May 31, 1996.
(3) Includes all outstanding options.
(4) Reflects exchange ratio of .81522 of a share of Mid-Peninsula Bancorp
    stock for each share of Cupertino National Bancorp stock.
(5) Based on closing prices as of June 5, 1996.