How Ameren Illinois compares with the utilities next door
| Utility | 2024 ¢/kWh | Customers | Δ vs Ameren Illinois, ¢/kWh | $/yr difference |
|---|---|---|---|---|
| MidAmerican Energy Co | 9.99 | 73,564 | -5.26 | -$569 |
| City of Springfield | 11.95 | 59,621 | -3.30 | -$357 |
| Southwestern Electric Coop Inc | 13.68 | 24,822 | -1.57 | -$170 |
| Southeastern IL Elec Coop, Inc | 14.47 | 22,731 | -0.79 | -$85 |
| Norris Electric Coop | 15.08 | 18,074 | -0.17 | -$19 |
| Commonwealth Edison (ComEd) | 15.22 | 2,922,223 | -0.04 | -$4 |
| Ameren Illinois Company (this page) | 15.26 | 520,498 | — | — |
| Egyptian Electric Coop Assn | 15.54 | 13,707 | +0.28 | +$30 |
| Corn Belt Energy Corporation | 15.76 | 34,710 | +0.50 | +$54 |
| Tri-County Electric Coop, Inc | 16.04 | 16,197 | +0.79 | +$85 |
| Wayne-White Counties Elec Coop | 16.58 | 11,957 | +1.32 | +$142 |
| Eastern Illinois Elec Coop | 17.10 | 11,115 | +1.84 | +$199 |
15 bundled utilities (≥5,000 customers) share at least one county with Ameren Illinois. Showing the 11 cheapest. Positive $/yr = that utility's customers pay more than Ameren Illinois customers at the same usage. Territories are fixed by address — these gaps measure cost differences between areas, while the supply portion is separately shoppable in Illinois (see below).
Where Ameren Illinois customers pay more (county benchmark)
| County | Cheapest utility in county | Their ¢/kWh | Ameren Illinois premium, $/yr |
|---|---|---|---|
| Adams | MidAmerican Energy Co | 9.99 | +$569 |
| Alexander | MidAmerican Energy Co | 9.99 | +$569 |
| Brown | MidAmerican Energy Co | 9.99 | +$569 |
| Calhoun | MidAmerican Energy Co | 9.99 | +$569 |
| Fulton | MidAmerican Energy Co | 9.99 | +$569 |
| Greene | MidAmerican Energy Co | 9.99 | +$569 |
| Hancock | MidAmerican Energy Co | 9.99 | +$569 |
| Henderson | MidAmerican Energy Co | 9.99 | +$569 |
Multiple utilities in one county means adjoining territories, not household choice — you cannot switch wires companies. In Illinois you can shop the supply portion regardless of county. Showing the 8 highest-premium counties of 81 served.
Rate trend and size
| Metric | 2023 | 2024 | Change |
|---|---|---|---|
| Average price, ¢/kWh | 17.04 | 15.26 | -10.5% |
| Residential customers | 614,162 | 520,498 | -15.3% |
Ownership: Investor Owned. Including delivery-only/third-party-supply accounts, Ameren Illinois serves 1,060,894 residential customers in IL. Statewide context: Illinois electricity rates.
Supply vs delivery on a Ameren Illinois bill
Illinois has residential electric supply choice: Ameren Illinois delivers the power and bills a default supply rate, but you may buy the supply portion from a licensed competitor instead. Compare offers against the price to compare on the state's official shopping site: pluginillinois.org.
Electric choice (ComEd/Ameren; Plug In Illinois publishes price-to-compare). Gas choice in Nicor/Peoples/North Shore territories.
Counties served (IL, EIA-861 2024)
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
Head-to-head comparisons
- Commonwealth Edison (ComEd) vs Ameren Illinois Company
- Ameren Illinois Company vs MidAmerican Energy Co
- Ameren Illinois Company vs City of Springfield
Questions people ask
- Is Ameren Illinois Company more expensive than other Illinois utilities?
- Ameren Illinois Company customers paid an average 15.26 cents/kWh in 2024 — 1% above the Illinois volume-weighted average of 15.06 cents (EIA-861, bundled residential service).
- Can I switch away from Ameren Illinois Company?
- You cannot switch the wires company — distribution territory is fixed by address. Illinois does allow supply choice, so you can buy the supply portion of the bill from a licensed competitor via pluginillinois.org if its offer beats the price to compare.
- How many customers does Ameren Illinois Company have?
- 520,498 residential customers in Illinois in 2024 across 81 counties, per its EIA-861 federal filing. Ownership type: investor-owned.