<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.


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


                                                             
<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 
<TOTAL-COMMON-STOCKHOLDERS-EQ>                                     646,043
<PREFERRED-MANDATORY>                                                    0
<PREFERRED>                                                         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
<PREFERRED-STOCK-CURRENT>                                                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 
<OTHER-OPERATING-EXPENSES>                                         509,799
<TOTAL-OPERATING-EXPENSES>                                         509,799 
<OPERATING-INCOME-LOSS>                                            102,533
<OTHER-INCOME-NET>                                                  11,888 
<INCOME-BEFORE-INTEREST-EXPEN>                                     114,421
<TOTAL-INTEREST-EXPENSE>                                            33,327
<NET-INCOME>                                                        50,751 
<PREFERRED-STOCK-DIVIDENDS>                                          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 
<EPS-DILUTED>                                                            0 


<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.