<ARTICLE> UT
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED
FROM UNISOURCE ENERGY FINANCIAL STATEMENTS FOR THE YEAR ENDED
DECEMBER 31, 1999 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE
TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<CIK> 0000941138
<NAME> UNISOURCE ENERGY CORPORATION
<MULTIPLIER> 1,000

                             
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               DEC-31-1999
<BOOK-VALUE>                                  PER-BOOK
<TOTAL-NET-UTILITY-PLANT>                    1,729,856
<OTHER-PROPERTY-AND-INVEST>                    114,483
<TOTAL-CURRENT-ASSETS>                         333,138
<TOTAL-DEFERRED-CHARGES>                       478,778
<OTHER-ASSETS>                                       0
<TOTAL-ASSETS>                               2,656,255
<COMMON>                                       641,723
<CAPITAL-SURPLUS-PAID-IN>                            0
<RETAINED-EARNINGS>                          (317,475)
<TOTAL-COMMON-STOCKHOLDERS-EQ>                 324,248
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<LONG-TERM-DEBT-NET>                         1,135,820
<SHORT-TERM-NOTES>                                   0
<LONG-TERM-NOTES-PAYABLE>                            0
<COMMERCIAL-PAPER-OBLIGATIONS>                       0
<LONG-TERM-DEBT-CURRENT-PORT>                   48,603
<PREFERRED-STOCK-CURRENT>                            0
<CAPITAL-LEASE-OBLIGATIONS>                    880,427
<LEASES-CURRENT>                                36,335
<OTHER-ITEMS-CAPITAL-AND-LIAB>                 230,822
<TOT-CAPITALIZATION-AND-LIAB>                2,656,255
<GROSS-OPERATING-REVENUE>                      803,812
<INCOME-TAX-EXPENSE>                            18,268
<OTHER-OPERATING-EXPENSES>                     628,099
<TOTAL-OPERATING-EXPENSES>                     646,367
<OPERATING-INCOME-LOSS>                        157,445
<OTHER-INCOME-NET>                              22,295
<INCOME-BEFORE-INTEREST-EXPEN>                 179,740
<TOTAL-INTEREST-EXPENSE>                       123,230
<NET-INCOME>                                    79,107
<PREFERRED-STOCK-DIVIDENDS>                          0
<EARNINGS-AVAILABLE-FOR-COMM>                   79,107
<COMMON-STOCK-DIVIDENDS>                         2,588
<TOTAL-INTEREST-ON-BONDS>                       66,836
<CASH-FLOW-OPERATIONS>                         113,228
<EPS-BASIC>                                       2.45
<EPS-DILUTED>                                     2.43