content: <PAGE>
   
                       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): OCTOBER 7, 1998
  
  
                               GREATER BAY BANCORP
             (Exact name of registrant as specified in its charter)
  
  
  
            CALIFORNIA                                          77-0387041
  (State or other jurisdiction of                            (I.R.S. employer
   incorporation or organization)                          identification number)
  
  
                        Commission file number:  0-25034
                                          
  
                             2860 WEST BAYSHORE ROAD
                           PALO ALTO, CALIFORNIA 94303
              (Address of principal executive offices and zip code)
  
  
       REGISTRANT'S TELEPHONE NUMBER, INCLUDING AREA CODE: (650) 813-8200
                                          
  
  
  
                                          
  <PAGE>
   
  ITEM 5.  OTHER EVENTS.
  
       Reference is hereby made to the Registrant's press releases attached
  hereto as Exhibits 99.1 and 99.2 which meet the requirements for filing under
  Item 5 and are incorporated herein by reference.
  
  ITEM 7.  FINANCIAL STATEMENTS AND EXHIBITS.
  
  Exhibits
  --------
  
  99.1   Press Release dated October 7, 1998.
  
  99.2   Press Release dated October 14, 1998.
  
                                         2
  <PAGE>
   
                                     SIGNATURES
  
       Pursuant to the requirements of the Securities Exchange Act of 1934, as
  amended, the Registrant has duly caused this report to be signed on its behalf
  by the undersigned hereunto duly authorized.
  
                                        GREATER BAY BANCORP
                                        (Registrant)
  
  
   
  Dated: October 16, 1998               By:  /s/ Steven C. Smith
                                             -------------------
                                             Steven C. Smith
                                             Executive Vice President, Chief
                                             Operating Officer and Chief Financial
                                             Officer
  
                                         3
  <PAGE>
   
                                  EXHIBIT INDEX
                                  -------------
  
  99.1   Press Release dated October 7, 1998.
  
  99.2   Press Release dated October 14, 1998.
  
                                         4
metadata_documents: [{"type": "8-K", "sequence": "1", "description": "FORM 8-K", "secsgml_size_bytes": 2641}]
metadata_filer: {"company-data": {"conformed-name": "GREATER BAY BANCORP", "cik": "0000775473", "assigned-sic": "6021", "irs-number": "770387041", "state-of-incorporation": "CA", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "000-25034", "film-number": "98727245"}, "business-address": {"street1": "2860 WEST BAYSHORE ROAD", "city": "PALO ALTO", "state": "CA", "zip": "94303", "phone": "4153751555"}, "mail-address": {"street1": "2860 BAYSHORE ROAD", "street2": "420 COWPER ST", "city": "PALO ALTO", "state": "CA", "zip": "943011504"}, "former-company": [{"former-conformed-name": "MID PENINSULA BANCORP", "date-changed": "19941031"}, {"former-conformed-name": "SAN MATEO COUNTY BANCORP", "date-changed": "19920703"}]}
text: 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): OCTOBER 7, 1998
  
                               GREATER BAY BANCORP
             (Exact name of registrant as specified in its charter)
  
            CALIFORNIA                                          77-0387041
  (State or other jurisdiction of                            (I.R.S. employer
   incorporation or organization)                          identification number)
  
                        Commission file number:  0-25034
                                          
  
                             2860 WEST BAYSHORE ROAD
                           PALO ALTO, CALIFORNIA 94303
              (Address of principal executive offices and zip code)
  
       REGISTRANT'S TELEPHONE NUMBER, INCLUDING AREA CODE: (650) 813-8200
  ITEM 5.  OTHER EVENTS.
  
       Reference is hereby made to the Registrant's press releases attached
  hereto as Exhibits 99.1 and 99.2 which meet the requirements for filing under
  Item 5 and are incorporated herein by reference.
  
  ITEM 7.  FINANCIAL STATEMENTS AND EXHIBITS.
  
  Exhibits
  --------
  
  99.1   Press Release dated October 7, 1998.
  
  99.2   Press Release dated October 14, 1998.
  
                                         2
  SIGNATURES
  
       Pursuant to the requirements of the Securities Exchange Act of 1934, as
  amended, the Registrant has duly caused this report to be signed on its behalf
  by the undersigned hereunto duly authorized.
  
                                        GREATER BAY BANCORP
                                        (Registrant)
  
   
  Dated: October 16, 1998               By:  /s/ Steven C. Smith
                                             -------------------
                                             Steven C. Smith
                                             Executive Vice President, Chief
                                             Operating Officer and Chief Financial
                                             Officer
  
                                         3
  EXHIBIT INDEX
                                  -------------
  
  99.1   Press Release dated October 7, 1998.
  
  99.2   Press Release dated October 14, 1998.
  
                                         4