<TABLE> <S> <C>
<ARTICLE> UT
<LEGEND>
This schedule contains summary financial information extracted from the June 30,
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> 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> 1,237,151
<OTHER-PROPERTY-AND-INVEST> 187,341
<TOTAL-CURRENT-ASSETS> 113,109
<TOTAL-DEFERRED-CHARGES> 155,017
<OTHER-ASSETS> 86,431
<TOTAL-ASSETS> 1,779,049
<COMMON> 66,183
<CAPITAL-SURPLUS-PAID-IN> 229,438
<RETAINED-EARNINGS> 335,103
<TOTAL-COMMON-STOCKHOLDERS-EQ> 630,724
0
59,963
<LONG-TERM-DEBT-NET> 514,132
<SHORT-TERM-NOTES> 28,791
<LONG-TERM-NOTES-PAYABLE> 55,100
<COMMERCIAL-PAPER-OBLIGATIONS> 0
<LONG-TERM-DEBT-CURRENT-PORT> 1,875
0
<CAPITAL-LEASE-OBLIGATIONS> 0
<LEASES-CURRENT> 0
<OTHER-ITEMS-CAPITAL-AND-LIAB> 488,464
<TOT-CAPITALIZATION-AND-LIAB> 1,779,049
<GROSS-OPERATING-REVENUE> 412,697
<INCOME-TAX-EXPENSE> 19,898 <F1>
<OTHER-OPERATING-EXPENSES> 347,076
<TOTAL-OPERATING-EXPENSES> 347,076 <F1>
<OPERATING-INCOME-LOSS> 65,621
<OTHER-INCOME-NET> 9,582
<INCOME-BEFORE-INTEREST-EXPEN> 75,203
<TOTAL-INTEREST-EXPENSE> 22,136
<NET-INCOME> 33,169
1,656
<EARNINGS-AVAILABLE-FOR-COMM> 31,513
<COMMON-STOCK-DIVIDENDS> 0
<TOTAL-INTEREST-ON-BONDS> 41,602
<CASH-FLOW-OPERATIONS> 86,688
<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>