<ARTICLE> 9
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM GREATER BAY
BANCORP'S FILING ON FORM 8-K DATED JULY 1, 1999 AND IS QUALIFIED IN ITS ENTIRETY
BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<RESTATED>
<MULTIPLIER> 1,000

                                                  
<PERIOD-TYPE>                   3-MOS                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1998             DEC-31-1998
<PERIOD-START>                             JUL-01-1998             APR-01-1998
<PERIOD-END>                               SEP-30-1998             JUN-30-1998
<CASH>                                          68,536                  83,588
<INT-BEARING-DEPOSITS>                               0                       0
<FED-FUNDS-SOLD>                               102,200                 134,700
<TRADING-ASSETS>                                     0                       0
<INVESTMENTS-HELD-FOR-SALE>                    311,819                 304,967
<INVESTMENTS-CARRYING>                          99,558                  46,722
<INVESTMENTS-MARKET>                           100,674                  47,429
<LOANS>                                        940,341                 902,010
<ALLOWANCE>                                    (21,862)                (19,758)
<TOTAL-ASSETS>                               1,686,988               1,625,699
<DEPOSITS>                                   1,420,984               1,407,953
<SHORT-TERM>                                         0                       0
<LIABILITIES-OTHER>                            110,246                  99,401
<LONG-TERM>                                     53,000                  23,000
<PREFERRED-MANDATORY>                                0                       0
<PREFERRED>                                          0                       0
<COMMON>                                        60,435                  58,387
<OTHER-SE>                                      42,323                  36,958
<TOTAL-LIABILITIES-AND-EQUITY>               1,686,988               1,625,699
<INTEREST-LOAN>                                 24,132                  23,197
<INTEREST-INVEST>                                6,044                   4,332
<INTEREST-OTHER>                                 2,822                   2,944
<INTEREST-TOTAL>                                32,998                  30,473
<INTEREST-DEPOSIT>                              11,933                  10,394
<INTEREST-EXPENSE>                              13,947                  12,503
<INTEREST-INCOME-NET>                           21,065                  17,970
<LOAN-LOSSES>                                    1,881                   1,377
<SECURITIES-GAINS>                                   4                      42
<EXPENSE-OTHER>                                 12,059                  12,800
<INCOME-PRETAX>                                  7,424                   5,978
<INCOME-PRE-EXTRAORDINARY>                       7,424                   5,978
<EXTRAORDINARY>                                      0                       0
<CHANGES>                                            0                       0
<NET-INCOME>                                     5,015                   3,846
<EPS-BASIC>                                       0.46                    0.35
<EPS-DILUTED>                                     0.43                    0.33
<YIELD-ACTUAL>                                    4.90                    5.17
<LOANS-NON>                                      3,061                   3,903
<LOANS-PAST>                                         0                      75
<LOANS-TROUBLED>                                     0                       0
<LOANS-PROBLEM>                                      0                       0
<ALLOWANCE-OPEN>                                19,758                  18,298
<CHARGE-OFFS>                                      (78)                    (19)
<RECOVERIES>                                       189                      32
<ALLOWANCE-CLOSE>                               21,862                  19,758
<ALLOWANCE-DOMESTIC>                            21,862                  19,758
<ALLOWANCE-FOREIGN>                                  0                       0
<ALLOWANCE-UNALLOCATED>                              0                       0