<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-31-1999             DEC-31-1998
<PERIOD-START>                             JAN-01-1999             OCT-01-1998
<PERIOD-END>                               MAR-31-1999             DEC-31-1998
<CASH>                                          79,244                  69,583
<INT-BEARING-DEPOSITS>                               0                       0
<FED-FUNDS-SOLD>                               106,400                  62,800
<TRADING-ASSETS>                                     0                       0
<INVESTMENTS-HELD-FOR-SALE>                    264,640                 257,258
<INVESTMENTS-CARRYING>                          97,892                  94,599
<INVESTMENTS-MARKET>                            97,122                  94,890
<LOANS>                                      1,234,879               1,092,603
<ALLOWANCE>                                    (24,046)                (23,379)
<TOTAL-ASSETS>                               1,938,452               1,738,189
<DEPOSITS>                                   1,675,844               1,478,947
<SHORT-TERM>                                         0                       0
<LIABILITIES-OTHER>                             99,370                  99,201
<LONG-TERM>                                     50,000                  53,000
<PREFERRED-MANDATORY>                                0                       0
<PREFERRED>                                          0                       0
<COMMON>                                        63,392                  62,179
<OTHER-SE>                                      49,846                  44,862
<TOTAL-LIABILITIES-AND-EQUITY>               1,938,452               1,738,189
<INTEREST-LOAN>                                 27,476                  25,115
<INTEREST-INVEST>                                5,343                   5,537
<INTEREST-OTHER>                                 1,642                   2,500
<INTEREST-TOTAL>                                34,461                  33,152
<INTEREST-DEPOSIT>                              11,796                  11,131
<INTEREST-EXPENSE>                              13,921                  13,475
<INTEREST-INCOME-NET>                           20,540                  19,677
<LOAN-LOSSES>                                      921                   1,941
<SECURITIES-GAINS>                                   0                     320
<EXPENSE-OTHER>                                 12,691                  12,763
<INCOME-PRETAX>                                  9,485                   8,074
<INCOME-PRE-EXTRAORDINARY>                       5,790                   8,074
<EXTRAORDINARY>                                    (88)                      0
<CHANGES>                                            0                       0
<NET-INCOME>                                     5,702                   5,628
<EPS-BASIC>                                       0.53                    0.51
<EPS-DILUTED>                                     0.50                    0.48
<YIELD-ACTUAL>                                    4.97                    4.90
<LOANS-NON>                                      2,992                   2,003
<LOANS-PAST>                                         0                       0
<LOANS-TROUBLED>                                     0                       0
<LOANS-PROBLEM>                                      0                       0
<ALLOWANCE-OPEN>                                23,379                  21,862
<CHARGE-OFFS>                                     (288)                   (507)
<RECOVERIES>                                        34                      84
<ALLOWANCE-CLOSE>                               24,046                  23,379
<ALLOWANCE-DOMESTIC>                            24,046                  23,379
<ALLOWANCE-FOREIGN>                                  0                       0
<ALLOWANCE-UNALLOCATED>                              0                       0