Alliant Energy's wholly-owned subsidiaries - Interstate Power and Light Company, and Wisconsin Power and Light Company - provide electric and natural gas service to more than one million customers in our three-state utility service territory.
Find a list of communities we serve or contact one of the state regulatory agencies that oversee our operations:
Iowa Utilities Board
1375 E. Court Avenue, Room 69
Des Moines, Iowa 50319-0069
Minnesota Public Utilities Commission
121 7th Place E. Suite 350
St. Paul, MN 55101-2147
Public Service Commission of Wisconsin
610 North Whitney Way
P.O. Box 7854
Madison, WI 53707-7854
For more information about our service territory, use our online database to view profiles of more than 300 Alliant Energy communities, with details on demographics, labor force, education, transportation and more.