Ameren Illinois

Ameren Illinois, a subsidiary of Ameren, provides electric and natural gas service throughout Illinois, with a service territory that includes more than 7 percent of the state's population and 35 percent of its surface area, including Quincy and East St. Louis to the west and Mattoon and Marion to the east and south.

Please see the links below for important information from Ameren regarding electric and natural gas rates. Please check back often for updated information.

Ameren Illinois Announcement Letter

Ameren Home Page

Illinois Rate Facts