<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.


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


                                             
<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
<PREFERRED-MANDATORY>                                                0
<PREFERRED>                                                     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
<PREFERRED-STOCK-CURRENT>                                            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 
<OTHER-OPERATING-EXPENSES>                                     347,076
<TOTAL-OPERATING-EXPENSES>                                     347,076 
<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
<PREFERRED-STOCK-DIVIDENDS>                                      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 
<EPS-DILUTED>                                                        0 



<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.