<TABLE> <S> <C>
<ARTICLE> UT
<LEGEND>
This schedule contains summary financial information extracted from the
September 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> 9-MOS
<FISCAL-YEAR-END> DEC-31-2000
<PERIOD-START> JAN-01-2000
<PERIOD-END> SEP-30-2000
<BOOK-VALUE> PER-BOOK
<TOTAL-NET-UTILITY-PLANT> 1,232,335
<OTHER-PROPERTY-AND-INVEST> 191,156
<TOTAL-CURRENT-ASSETS> 117,388
<TOTAL-DEFERRED-CHARGES> 161,336
<OTHER-ASSETS> 82,973
<TOTAL-ASSETS> 1,785,188
<COMMON> 66,183
<CAPITAL-SURPLUS-PAID-IN> 229,437
<RETAINED-EARNINGS> 350,423 <F1>
<TOTAL-COMMON-STOCKHOLDERS-EQ> 646,043
0
59,963
<LONG-TERM-DEBT-NET> 514,170
<SHORT-TERM-NOTES> 25,560
<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> 482,477
<TOT-CAPITALIZATION-AND-LIAB> 1,785,188
<GROSS-OPERATING-REVENUE> 612,332
<INCOME-TAX-EXPENSE> 30,343 <F2>
<OTHER-OPERATING-EXPENSES> 509,799
<TOTAL-OPERATING-EXPENSES> 509,799 <F2>
<OPERATING-INCOME-LOSS> 102,533
<OTHER-INCOME-NET> 11,888 <F3>
<INCOME-BEFORE-INTEREST-EXPEN> 114,421
<TOTAL-INTEREST-EXPENSE> 33,327
<NET-INCOME> 50,751 <F3>
2,483
<EARNINGS-AVAILABLE-FOR-COMM> 48,268
<COMMON-STOCK-DIVIDENDS> 0
<TOTAL-INTEREST-ON-BONDS> 42,023
<CASH-FLOW-OPERATIONS> 126,540
<EPS-BASIC> 0 <F4>
<EPS-DILUTED> 0 <F4>
<FN>
<F1> Includes <$1,321> of Accumulated Other Comprehensive Income.
<F2> Income tax expense is not included in Operating Expense in the Consolidated Statements of Income.
<F3>Includes $35 of Cumulative Effect of a Change in Accounting Principle, Net of Tax.
<F4>Earnings per share of common stock is not reflected because all common shares are held by Alliant Energy Corporation.
</FN>
</TABLE>