<ARTICLE>  UT
<CIK>   0000081027
<NAME>  PUBLIC SERVICE COMPANY OF OKLAHOMA
<SUBSIDIARY>
<NUMBER> 004
<NAME>  PUBLIC SERVICE COMPANY OF OKLAHOMA
<MULTIPLIER> 1,000

                                    
<PERIOD-TYPE>                          12-MOS
<FISCAL-YEAR-END>                             DEC-31-2000
<PERIOD-END>                                  MAR-31-2000
<BOOK-VALUE>                                     PER-BOOK
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<OTHER-ASSETS>                                     52,297
<TOTAL-ASSETS>                                  1,546,504
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<CAPITAL-SURPLUS-PAID-IN>                         180,000
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<TOTAL-COMMON-STOCKHOLDERS-EQ>                    463,872
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<LONG-TERM-DEBT-NET>                              419,592
<SHORT-TERM-NOTES>                                110,203
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<GROSS-OPERATING-REVENUE>                         161,329
<INCOME-TAX-EXPENSE>                                   68
<OTHER-OPERATING-EXPENSES>                        149,890
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<OTHER-INCOME-NET>                                    222
<INCOME-BEFORE-INTEREST-EXPEN>                     11,593
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<NET-INCOME>                                        1,676
<PREFERRED-STOCK-DIVIDENDS>                            53
<EARNINGS-AVAILABLE-FOR-COMM>                       1,623
<COMMON-STOCK-DIVIDENDS>                           17,000
<TOTAL-INTEREST-ON-BONDS>                           5,198
<CASH-FLOW-OPERATIONS>                             34,188
<EPS-BASIC>                                           0
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