<TABLE> <S> <C>

<ARTICLE>                     UT

<LEGEND>
This schedule  contains summary financial  information  extracted from the March
31, 2000 Financial  Statements  included in Wisconsin  Power and Light Company's
Form 10-Q and is  qualified  in its  entirety  by  reference  to such  Financial
Statements.
</LEGEND>

<CIK>     0000107832
<NAME>    WISCONSIN POWER AND LIGHT COMPANY
<MULTIPLIER>     1,000


<S>                                                         <C>
<PERIOD-TYPE>                                   3-MOS
<FISCAL-YEAR-END>                                          DEC-31-2000
<PERIOD-START>                                             JAN-01-2000
<PERIOD-END>                                               MAR-31-2000
<BOOK-VALUE>                                                  PER-BOOK
<TOTAL-NET-UTILITY-PLANT>                                    1,237,575
<OTHER-PROPERTY-AND-INVEST>                                    183,140
<TOTAL-CURRENT-ASSETS>                                         112,678
<TOTAL-DEFERRED-CHARGES>                                       150,113
<OTHER-ASSETS>                                                  88,368
<TOTAL-ASSETS>                                               1,771,874
<COMMON>                                                        66,183
<CAPITAL-SURPLUS-PAID-IN>                                      229,438
<RETAINED-EARNINGS>                                            324,519
<TOTAL-COMMON-STOCKHOLDERS-EQ>                                 620,140
<PREFERRED-MANDATORY>                                                0
<PREFERRED>                                                     59,963
<LONG-TERM-DEBT-NET>                                           514,092
<SHORT-TERM-NOTES>                                                 633
<LONG-TERM-NOTES-PAYABLE>                                       55,100
<COMMERCIAL-PAPER-OBLIGATIONS>                                       0
<LONG-TERM-DEBT-CURRENT-PORT>                                    1,875
<PREFERRED-STOCK-CURRENT>                                            0
<CAPITAL-LEASE-OBLIGATIONS>                                          0
<LEASES-CURRENT>                                                     0
<OTHER-ITEMS-CAPITAL-AND-LIAB>                                 520,071
<TOT-CAPITALIZATION-AND-LIAB>                                1,771,874
<GROSS-OPERATING-REVENUE>                                      218,832
<INCOME-TAX-EXPENSE>                                            12,857
<OTHER-OPERATING-EXPENSES>                                     178,337
<TOTAL-OPERATING-EXPENSES>                                     178,337
<OPERATING-INCOME-LOSS>                                         40,495
<OTHER-INCOME-NET>                                               5,141
<INCOME-BEFORE-INTEREST-EXPEN>                                  45,636
<TOTAL-INTEREST-EXPENSE>                                        10,908
<NET-INCOME>                                                    21,871
<PREFERRED-STOCK-DIVIDENDS>                                        828
<EARNINGS-AVAILABLE-FOR-COMM>                                   21,043
<COMMON-STOCK-DIVIDENDS>                                             0
<TOTAL-INTEREST-ON-BONDS>                                       41,182
<CASH-FLOW-OPERATIONS>                                          95,511
<EPS-BASIC>                                                          0 <F2>
<EPS-DILUTED>                                                        0 <F2>


<FN>
<F1> Income tax expense is not included in Operating Expense in the Consolidated
     Statements of Income.

<F2>Earnings per share of common stock is not reflected because all common
    shares are held by Alliant Energy Corporation.
</FN>

</TABLE>