US Energy Price Monitorby KadoaUpdated weeklyStar on GitHub

NewInsight: Investor-owned utilities charge 23% more for power

Illinois

Ameren Illinois electricity rates

What homes pay Ameren Illinois for electricity, from EIA.

Investor-owned utility, 634,558 homes in Illinois. EIA lists it as Ameren Illinois Company.

Headlines

Average price
17.4¢ a kWh
Up 5.5% on a year ago
Average bill
$153 a month
Up 7.2% on a year ago
Average use
876 kWh
A month. Illinois 697 kWh
Price rank in Illinois
2 of 3
1 is the most expensive

Over the 12 months to August 2026, Ameren Illinois homes paid 17.4¢ a kWh, against 18.9¢ across Illinois.

Ameren Illinois vs Illinois

Ameren IllinoisIllinois
Average price, 12 months to August 202617.4¢18.9¢
Price in August 202619.4¢19.3¢
Average monthly bill, 12 months$153$132
Bill in August 2026$205$171
Average monthly use876 kWh697 kWh
Price change, past year+5.5%+11%
Price change since 2019+85%+45%

Electricity price

Average residential price a kilowatt-hour, by month.

Up to and including August 2026

Source: EIA-861M monthly utility survey. Revenue over kilowatt-hours sold, including fixed charges.

Average monthly bill

What an average home pays a month.

Up to and including August 2026

Source: EIA-861M monthly utility survey.