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Ameren Illinois Company
Ameren Illinois Company served 475,151 residential customers in Illinois in 2025 (8.8% of the state's residential customers), the 2nd largest of 77 utilities reporting there. Delivery-only service; ownership: investor owned; balancing authority MISO.
The meter, one average month.
Scroll to run 30 days of Ameren Illinois Company's average residential use through a five-dial register.
- Used so far
- 875 kWh
- At 8.77¢/kWh
- $76.67
Price ruler0 to 50¢ per kWh
Where 8.77¢ sits.
This page covers delivery-only service, which is only part of a household's bill, so its 8.77¢ is not compared with the Illinois bundled average of 17.69¢. Both are drawn for scale only.
2020 and 2025EIA-861
Five years, same meter.
In 2020 the average Ameren Illinois Company home used 894 kWh a month at 5.8¢ and paid $51.91. In 2025 it used 875 kWh at 8.77¢ and paid $76.67: the price per kWh is up 51%.
| Measure | 2020 | 2025 |
|---|---|---|
| Price, ¢/kWh | 5.8 | 8.77 |
| Use, kWh a month | 894 | 875 |
| Bill, US$ a month | 51.91 | 76.67 |
| Class | Customers | MWh sold | ¢/kWh |
|---|---|---|---|
| Residential | 475,151 | 4,986,381 | 8.77 |
| Commercial | 90,423 | 9,459,764 | 4.74 |
| Industrial | 657 | 9,737,370 | 1.53 |
Who else is on the line
Homes are one class.
Homes took 20.6% of the electricity Ameren Illinois Company sold in Illinois in 2025.
Rooftop solar on its linesnet metering
39,801 roofs.
- Residential net-metered PV
- 39,801installations reported for 2025
- Capacity
- 437.8 MWresidential, net metered
- Per 1,000 homes
- 83.8installations per 1,000 residential customers
Service territoryEIA-861
81 counties.
AdamsAlexanderBondBrownBureauCalhounCassChampaignChristianClarkClayClintonColesCrawfordCumberlandDeWittDouglasEdgarEdwardsEffinghamFayetteFordFranklinFulton
Counties in Illinois where Ameren Illinois Company reported serving customers in 2025 (81 in all; up to 24 listed).
EIA-8612025Utility 56697
The filing, line by line.
| Measure | Value | Unit |
|---|---|---|
| Average price | 8.77 | ¢/kWh |
| Illinois average price | 17.69 | ¢/kWh |
| Price change over 5 years | 51.0 | % |
| Typical monthly use | 875 | kWh |
| Typical monthly bill | 76.67 | US$ |
| Residential customers | 475,151 | accounts |
| Share of IL residential customers | 8.8 | % |
| Size rank in IL | 2 of 77 | by customers |
Rate plans on fileOpenEI URDB
None shown for this page. Plan counts appear once per utility, on its largest state's bundled page; how plans are counted.