<TABLE> <S> <C>

<ARTICLE>                                      UT

<LEGEND>
This schedule contains summary financial information extracted from the June 30,
2000 Financial Statements included in Alliant Energy Corporation's Form 10-Q and
is qualified in its entirety by reference to such Financial Statements.
</LEGEND>

<CIK>     0000352541
<NAME>     ALLIANT ENERGY CORPORATION
<MULTIPLIER>     1,000


<S>                                          <C>
<PERIOD-TYPE>                               6-MOS
<FISCAL-YEAR-END>                                          DEC-31-2000
<PERIOD-START>                                             JAN-01-2000
<PERIOD-END>                                               JUN-30-2000
<BOOK-VALUE>                                                  PER-BOOK
<TOTAL-NET-UTILITY-PLANT>                                    3,120,014
<OTHER-PROPERTY-AND-INVEST>                                  2,610,482
<TOTAL-CURRENT-ASSETS>                                         411,193
<TOTAL-DEFERRED-CHARGES>                                       202,200
<OTHER-ASSETS>                                                 253,189
<TOTAL-ASSETS>                                               6,597,078
<COMMON>                                                           790
<CAPITAL-SURPLUS-PAID-IN>                                      945,387
<RETAINED-EARNINGS>                                          1,239,384 <F1>
<TOTAL-COMMON-STOCKHOLDERS-EQ>                               2,185,561
                                           24,612
                                                     89,102
<LONG-TERM-DEBT-NET>                                         1,915,153
<SHORT-TERM-NOTES>                                              42,044
<LONG-TERM-NOTES-PAYABLE>                                       55,100
<COMMERCIAL-PAPER-OBLIGATIONS>                                 407,495
<LONG-TERM-DEBT-CURRENT-PORT>                                   65,645
                                            0
<CAPITAL-LEASE-OBLIGATIONS>                                     21,455
<LEASES-CURRENT>                                                11,481
<OTHER-ITEMS-CAPITAL-AND-LIAB>                               1,779,430
<TOT-CAPITALIZATION-AND-LIAB>                                6,597,078
<GROSS-OPERATING-REVENUE>                                    1,193,415
<INCOME-TAX-EXPENSE>                                            38,476 <F2>
<OTHER-OPERATING-EXPENSES>                                   1,044,858
<TOTAL-OPERATING-EXPENSES>                                   1,044,858 <F2>
<OPERATING-INCOME-LOSS>                                        148,557
<OTHER-INCOME-NET>                                              37,285
<INCOME-BEFORE-INTEREST-EXPEN>                                 185,842
<TOTAL-INTEREST-EXPENSE>                                        82,412
<NET-INCOME>                                                    64,954
                                      3,356
<EARNINGS-AVAILABLE-FOR-COMM>                                   61,598
<COMMON-STOCK-DIVIDENDS>                                        78,987
<TOTAL-INTEREST-ON-BONDS>                                      144,775
<CASH-FLOW-OPERATIONS>                                         198,755
<EPS-BASIC>                                                       0.78
<EPS-DILUTED>                                                     0.78


<FN>
<F1> Includes $679,194 of Accumulated Other Comprehensive Income.

<F2> Income tax expense is not included in Operating Expense in the Consolidated
     Statements of Income.
</FN>

</TABLE>



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