<ARTICLE> 9
<RESTATED> 
<CIK> 0000812348
<NAME> CENTURY BANCORP, INC.
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS
       
                             
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-START>                             JAN-01-1997
<PERIOD-END>                               DEC-31-1997
<EXCHANGE-RATE>                                      1
<CASH>                                          46,868
<INT-BEARING-DEPOSITS>                              24
<FED-FUNDS-SOLD>                                51,000
<TRADING-ASSETS>                                     0
<INVESTMENTS-HELD-FOR-SALE>                     89,190
<INVESTMENTS-CARRYING>                         109,239
<INVESTMENTS-MARKET>                           109,454
<LOANS>                                        316,390
<ALLOWANCE>                                      4,446
<TOTAL-ASSETS>                                 631,125
<DEPOSITS>                                     515,449
<SHORT-TERM>                                    46,324
<LIABILITIES-OTHER>                             15,495
<LONG-TERM>                                          0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                         5,868
<OTHER-SE>                                      47,989
<TOTAL-LIABILITIES-AND-EQUITY>                 631,125
<INTEREST-LOAN>                                 28,353
<INTEREST-INVEST>                               12,156
<INTEREST-OTHER>                                   707
<INTEREST-TOTAL>                                41,216
<INTEREST-DEPOSIT>                              14,356
<INTEREST-EXPENSE>                              15,922
<INTEREST-INCOME-NET>                           25,294
<LOAN-LOSSES>                                      660
<SECURITIES-GAINS>                                   0
<EXPENSE-OTHER>                                 18,600
<INCOME-PRETAX>                                 11,028
<INCOME-PRE-EXTRAORDINARY>                      11,028
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     6,823
<EPS-PRIMARY>                                     1.18
<EPS-DILUTED>                                     1.17
<YIELD-ACTUAL>                                    4.99
<LOANS-NON>                                      1,705
<LOANS-PAST>                                         7
<LOANS-TROUBLED>                                 3,306
<LOANS-PROBLEM>                                  5,018
<ALLOWANCE-OPEN>                                 4,179
<CHARGE-OFFS>                                      689
<RECOVERIES>                                       296
<ALLOWANCE-CLOSE>                                4,446
<ALLOWANCE-DOMESTIC>                             4,446
<ALLOWANCE-FOREIGN>                                  0
<ALLOWANCE-UNALLOCATED>                              0