<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-31-1997
<PERIOD-START>                             JAN-01-1998             OCT-01-1997
<PERIOD-END>                               MAR-31-1998             DEC-31-1997
<CASH>                                          83,159                  64,531
<INT-BEARING-DEPOSITS>                               0                       0
<FED-FUNDS-SOLD>                                87,500                  82,500
<TRADING-ASSETS>                                     0                       0
<INVESTMENTS-HELD-FOR-SALE>                    199,576                 167,519
<INVESTMENTS-CARRYING>                          52,110                  58,943
<INVESTMENTS-MARKET>                            52,817                  59,650
<LOANS>                                        853,883                 819,607
<ALLOWANCE>                                    (18,298)                (18,032)
<TOTAL-ASSETS>                               1,448,969               1,339,750
<DEPOSITS>                                   1,218,560               1,178,574
<SHORT-TERM>                                         0                       0
<LIABILITIES-OTHER>                            114,719                  49,649
<LONG-TERM>                                     23,000                  23,000
<PREFERRED-MANDATORY>                                0                       0
<PREFERRED>                                          0                       0
<COMMON>                                        54,758                  57,004
<OTHER-SE>                                      37,932                  31,523
<TOTAL-LIABILITIES-AND-EQUITY>               1,448,969               1,339,750
<INTEREST-LOAN>                                 21,644                  21,250
<INTEREST-INVEST>                                3,912                   5,139
<INTEREST-OTHER>                                 2,619                   1,153
<INTEREST-TOTAL>                                28,175                  27,542
<INTEREST-DEPOSIT>                               9,556                   8,194
<INTEREST-EXPENSE>                              11,255                  10,429
<INTEREST-INCOME-NET>                           18,619                  17,113
<LOAN-LOSSES>                                    1,036                   1,169
<SECURITIES-GAINS>                                   8                      25
<EXPENSE-OTHER>                                 11,324                  14,548
<INCOME-PRETAX>                                  6,680                   3,608
<INCOME-PRE-EXTRAORDINARY>                       6,680                   3,608
<EXTRAORDINARY>                                      0                       0
<CHANGES>                                            0                       0
<NET-INCOME>                                     4,454                   2,301
<EPS-BASIC>                                       0.43                    0.22
<EPS-DILUTED>                                     0.40                    0.20
<YIELD-ACTUAL>                                    5.38                    5.99
<LOANS-NON>                                      3,325                   3,344
<LOANS-PAST>                                       108                     158
<LOANS-TROUBLED>                                     0                       0
<LOANS-PROBLEM>                                      0                       0
<ALLOWANCE-OPEN>                                18,032                  16,281
<CHARGE-OFFS>                                     (888)                   (839)
<RECOVERIES>                                       118                      21
<ALLOWANCE-CLOSE>                               18,298                  18,032
<ALLOWANCE-DOMESTIC>                            18,298                  18,032
<ALLOWANCE-FOREIGN>                                  0                       0
<ALLOWANCE-UNALLOCATED>                              0                       0