<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-31-1997             DEC-31-1997
<PERIOD-START>                             JUL-01-1997             APR-01-1997
<PERIOD-END>                               SEP-30-1997             JUN-30-1997
<CASH>                                          61,687                  54,315
<INT-BEARING-DEPOSITS>                               0                       0
<FED-FUNDS-SOLD>                                68,300                  65,900
<TRADING-ASSETS>                                     0                       0
<INVESTMENTS-HELD-FOR-SALE>                    110,046                  93,569
<INVESTMENTS-CARRYING>                          56,668                  60,435
<INVESTMENTS-MARKET>                            57,375                  61,142
<LOANS>                                        767,731                 728,539
<ALLOWANCE>                                    (16,281)                (15,417)
<TOTAL-ASSETS>                               1,212,832               1,135,912
<DEPOSITS>                                   1,077,876               1,006,859
<SHORT-TERM>                                         0                       0
<LIABILITIES-OTHER>                             23,000                  23,000
<LONG-TERM>                                     24,873                  23,258
<PREFERRED-MANDATORY>                                0                       0
<PREFERRED>                                          0                       0
<COMMON>                                        53,481                  53,212
<OTHER-SE>                                      33,602                  29,583
<TOTAL-LIABILITIES-AND-EQUITY>               1,212,832               1,135,912
<INTEREST-LOAN>                                 20,606                  18,892
<INTEREST-INVEST>                                3,546                   3,736
<INTEREST-OTHER>                                 1,388                   1,229
<INTEREST-TOTAL>                                25,540                  23,857
<INTEREST-DEPOSIT>                               8,709                   8,698
<INTEREST-EXPENSE>                               9,629                   9,241
<INTEREST-INCOME-NET>                           15,911                  14,616
<LOAN-LOSSES>                                    1,344                   2,420
<SECURITIES-GAINS>                                   5                       8
<EXPENSE-OTHER>                                  9,996                   9,798
<INCOME-PRETAX>                                  6,785                   5,604
<INCOME-PRE-EXTRAORDINARY>                       6,785                   5,604
<EXTRAORDINARY>                                      0                       0
<CHANGES>                                            0                       0
<NET-INCOME>                                     4,292                   3,576
<EPS-BASIC>                                       0.40                    0.34
<EPS-DILUTED>                                     0.38                    0.32
<YIELD-ACTUAL>                                    5.77                    5.60
<LOANS-NON>                                      5,272                   7,064
<LOANS-PAST>                                       734                     320
<LOANS-TROUBLED>                                     0                       0
<LOANS-PROBLEM>                                      0                       0
<ALLOWANCE-OPEN>                                15,417                  13,374
<CHARGE-OFFS>                                     (498)                   (421)
<RECOVERIES>                                        17                      44
<ALLOWANCE-CLOSE>                               16,281                  15,417
<ALLOWANCE-DOMESTIC>                            16,281                  15,417
<ALLOWANCE-FOREIGN>                                  0                       0
<ALLOWANCE-UNALLOCATED>                              0                       0