
<TABLE> <S> <C>


<ARTICLE>                                            9
<LEGEND>
          This schedule  contains summary financial  information  extracted from
     BOK  FinancialCorporation's  10-Q for the period ended June 30, 1999 and is
     qualified in its entirety by reference to such financial statements.
</LEGEND>
<CIK>       0000875357
<NAME>      BOK FINANCIAL CORPORATION
<MULTIPLIER>                                   1,000

<S>                             <C>
<PERIOD-TYPE>                   6-mos
<FISCAL-YEAR-END>                              DEC-31-1999
<PERIOD-END>                                   JUN-30-1999
<CASH>                                             457,142
<INT-BEARING-DEPOSITS>                                   0
<FED-FUNDS-SOLD>                                    45,440
<TRADING-ASSETS>                                    52,450
<INVESTMENTS-HELD-FOR-SALE>                      2,634,252
<INVESTMENTS-CARRYING>                             222,895
<INVESTMENTS-MARKET>                               221,649
<LOANS>                                          4,127,117
<ALLOWANCE>                                         72,732
<TOTAL-ASSETS>                                   7,992,420
<DEPOSITS>                                       5,017,867
<SHORT-TERM>                                     2,018,938
<LIABILITIES-OTHER>                                 97,183
<LONG-TERM>                                        179,975
<PREFERRED-MANDATORY>                                    0
<PREFERRED>                                             25
<COMMON>                                                 3
<OTHER-SE>                                         529,878
<TOTAL-LIABILITIES-AND-EQUITY>                   7,992,420
<INTEREST-LOAN>                                    149,648
<INTEREST-INVEST>                                   76,498
<INTEREST-OTHER>                                     2,441
<INTEREST-TOTAL>                                   228,587
<INTEREST-DEPOSIT>                                  68,859
<INTEREST-EXPENSE>                                 119,993
<INTEREST-INCOME-NET>                              108,594
<LOAN-LOSSES>                                        5,968
<SECURITIES-GAINS>                                     (14)
<EXPENSE-OTHER>                                     70,678
<INCOME-PRETAX>                                     32,798
<INCOME-PRE-EXTRAORDINARY>                          32,798
<EXTRAORDINARY>                                          0
<CHANGES>                                                0
<NET-INCOME>                                        22,056
<EPS-BASIC>                                         0.90
<EPS-DILUTED>                                         0.80
<YIELD-ACTUAL>                                        3.59
<LOANS-NON>                                         20,475
<LOANS-PAST>                                        11,082
<LOANS-TROUBLED>                                         0
<LOANS-PROBLEM>                                     53,796
<ALLOWANCE-OPEN>                                    68,994
<CHARGE-OFFS>                                        2,796
<RECOVERIES>                                         2,471
<ALLOWANCE-CLOSE>                                   72,732
<ALLOWANCE-DOMESTIC>                                72,732
<ALLOWANCE-FOREIGN>                                      0
<ALLOWANCE-UNALLOCATED>                                  0



</TABLE>
