<ARTICLE> UT
<CIK> 0000941138
<NAME> UNISOURCE ENERGY CORPORATION
<MULTIPLIER> 1,000

                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               JUN-30-1999
<BOOK-VALUE>                                  PER-BOOK
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<OTHER-PROPERTY-AND-INVEST>                    128,268
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<OTHER-ASSETS>                                       0
<TOTAL-ASSETS>                               2,604,321
<COMMON>                                       641,225
<CAPITAL-SURPLUS-PAID-IN>                            0
<RETAINED-EARNINGS>                          (395,814)
<TOTAL-COMMON-STOCKHOLDERS-EQ>                 245,411
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<LONG-TERM-DEBT-NET>                         1,136,320
<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>                    867,302
<LEASES-CURRENT>                                18,444
<OTHER-ITEMS-CAPITAL-AND-LIAB>                 288,241
<TOT-CAPITALIZATION-AND-LIAB>                2,604,321
<GROSS-OPERATING-REVENUE>                      350,480
<INCOME-TAX-EXPENSE>                             1,399
<OTHER-OPERATING-EXPENSES>                     292,795
<TOTAL-OPERATING-EXPENSES>                     294,194
<OPERATING-INCOME-LOSS>                         56,286
<OTHER-INCOME-NET>                             (2,158)
<INCOME-BEFORE-INTEREST-EXPEN>                  54,128
<TOTAL-INTEREST-EXPENSE>                        55,948
<NET-INCOME>                                   (1,820)
<PREFERRED-STOCK-DIVIDENDS>                          0
<EARNINGS-AVAILABLE-FOR-COMM>                  (1,820)
<COMMON-STOCK-DIVIDENDS>                             0
<TOTAL-INTEREST-ON-BONDS>                            0
<CASH-FLOW-OPERATIONS>                          27,331
<EPS-BASIC>                                    (.06)
<EPS-DILUTED>                                    (.06)