<ARTICLE> 5 <LEGEND> THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE CONSOLIDATED CONDENSED STATEMENT OF INCOME FOR THE NINE MONTHS ENDED MAY 31, 1997, AND THE CONSOLIDATED CONDENSED BALANCE SHEET AT MAY 31, 1997, FOR ONEOK INC. AND SUBSIDIARIES AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS. </LEGEND> <MULTIPLIER> 1,000 <PERIOD-TYPE> 3-MOS <FISCAL-YEAR-END> AUG-31-1997 <PERIOD-START> SEP-01-1996 <PERIOD-END> MAY-31-1997 <CASH> 12,851 <SECURITIES> 0 <RECEIVABLES> 110,310 <ALLOWANCES> 0 <INVENTORY> 64,612 <CURRENT-ASSETS> 203,665 <PP&E> 1,400,223 <DEPRECIATION> 572,229 <TOTAL-ASSETS> 1,220,075 <CURRENT-LIABILITIES> 160,687 <BONDS> 0 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 227,263 <OTHER-SE> 264,144 <TOTAL-LIABILITY-AND-EQUITY> 1,220,075 <SALES> 0 <TOTAL-REVENUES> 954,031 <CGS> 0 <TOTAL-COSTS> 864,027 <OTHER-EXPENSES> 0 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 25,819 <INCOME-PRETAX> 103,840 <INCOME-TAX> 39,655 <INCOME-CONTINUING> 64,185 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 63,900 <EPS-PRIMARY> 0.90 <EPS-DILUTED> 0.90