<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
FINANCIAL STATEMENTS OF ONEOK, INC. FOR THE PERIOD ENDED NOVEMBER 30, 1998, AND
IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000

                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          SEP-01-1998
<PERIOD-START>                             AUG-31-1999
<PERIOD-END>                               NOV-30-1998
<CASH>                                               0
<SECURITIES>                                        40
<RECEIVABLES>                                  216,837
<ALLOWANCES>                                         0
<INVENTORY>                                    173,142
<CURRENT-ASSETS>                               404,358
<PP&E>                                       2,592,911
<DEPRECIATION>                                 926,029
<TOTAL-ASSETS>                               2,496,155
<CURRENT-LIABILITIES>                          338,466
<BONDS>                                        512,355
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                        200
<COMMON>                                           315
<OTHER-SE>                                   1,163,506
<TOTAL-LIABILITY-AND-EQUITY>                 2,496,155
<SALES>                                        374,936
<TOTAL-REVENUES>                               374,936
<CGS>                                          239,836
<TOTAL-COSTS>                                  239,836
<OTHER-EXPENSES>                               105,101
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                              11,355
<INCOME-PRETAX>                                 23,637
<INCOME-TAX>                                     9,387
<INCOME-CONTINUING>                             14,250
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    14,250
<EPS-BASIC>                                       0.16
<EPS-DILUTED>                                     0.16