Illinois · Investor Owned
Ameren Illinois Company
16.70¢ per kWh, bundled, EIA-861 2025. Average bill $148.32 at 887.9 kWh a month, across 587,659 customers on that row.
Illinois averaged 17.67¢/kWh and $126.59 a month. The United States averaged 17.23¢/kWh and $150.68. State and national figures come from EIA's Average Bill file.
Revenue divided by sales, EIA-861 Sales to Ultimate Customers, 2025, released October 7, 2026. Texas wires utilities come from the Delivery Companies file. The price and bill use bundled service. Customer count: 587,659, the largest residential count across service types.
Estimate a bill
The figure below is this utility's 2025 EIA residential average.
2025 EIA average
$167.00
16.70¢/kWh × 1,000 kWh. Bundled residential average, EIA-861 2025. The customer charge is already folded into this average, so it stands beside a tariff total rather than being added to it.
Other service rows
Delivery and bundled prices cover different charges, so they are listed separately.
| Row | ¢/kWh | Bill | kWh | Customers |
|---|---|---|---|---|
| Delivery only | 8.77¢ | $76.67 | 874.5 | 475,151 |
Annual history
| Year | ¢/kWh | Avg. bill | Avg. kWh | Customers |
|---|---|---|---|---|
| 2015 | 10.32¢ | $92.26 | 893.7 | 447,261 |
| 2016 | 10.40¢ | $93.86 | 902.6 | 429,476 |
| 2017 | 10.40¢ | $90.85 | 873.3 | 433,310 |
| 2018 | 9.79¢ | $93.81 | 958.6 | 435,000 |
| 2019 | 9.42¢ | $87.89 | 932.7 | 435,634 |
| 2020 | 9.74¢ | $88.23 | 906.1 | 459,922 |
| 2021 | 11.17¢ | $102.86 | 920.5 | 429,485 |
| 2022 | 15.37¢ | $145.91 | 949.3 | 531,572 |
| 2023 | 17.04¢ | $139.98 | 821.3 | 614,162 |
| 2024 | 15.26¢ | $130.20 | 853.4 | 520,498 |
| 2025 | 16.70¢ | $148.32 | 887.9 | 587,659 |
EIA-861, 2015–2025, using the same service type as the 2025 figure. A blank year means that service was not in the file.
Counties
Adams, Alexander, Bond, Brown, Bureau, Calhoun, Cass, Champaign, Christian, Clark, Clay, Clinton, Coles, Crawford, Cumberland, DeWitt, Douglas, Edgar, Edwards, Effingham, Fayette, Ford, Franklin, Fulton, Gallatin, Greene, Hancock, Henderson, Henry, Iroquois, Jackson, Jasper, Jefferson, Jersey, Johnson, Kendall, Knox, LaSalle, Lawrence, Livingston, Logan, Macon, Macoupin, Madison, Marion, Marshall, Mason, Massac, McDonough, McLean, Menard, Mercer, Monroe, Montgomery, Morgan, Moultrie, Peoria, Perry, Piatt, Pike, Pulaski, Putnam, Randolph, Richland, Saline, Sangamon, Schuyler, Scott, Shelby, St Clair, Stark, Tazewell, Union, Vermilion, Wabash, Warren, Washington, Wayne, White, Williamson, Woodford.
EIA-861 Service Territory, 2025. A listed county is the county EIA recorded. It does not mean every address in the county is served. Open this utility in the bill calculator · Rate history tool