Utilities listed
25
Illinois, 2025
Homes counted
5.42 million
Residential customers
Average price
17.67 cents
Per kWh, Illinois
Average bill
$126.59
Per month
Utilities serving Illinois homes
| Utility | Type | Homes in IL | Cents per kWh | Monthly bill |
|---|---|---|---|---|
| ComEd | Investor-owned | 3,753,924 | 17.71 | $107.32 |
| Ameren Illinois | Investor-owned | 1,062,810 | 16.70 | $148.32 |
| MidAmerican Energy | Investor-owned | 73,481 | 11.08 | $90.99 |
| City of Springfield | Municipal | 59,366 | 13.09 | $113.16 |
| City of Naperville | Municipal | 57,225 | 14.61 | $112.32 |
| Corn Belt Energy | Cooperative | 34,952 | 15.59 | $147.98 |
| Southwestern Electric Cooperative | Cooperative | 24,414 | 15.37 | $178.24 |
| Southeastern Illinois Electric Cooperative | Cooperative | 22,607 | 14.80 | $180.79 |
| Norris Electric Cooperative | Cooperative | 18,163 | 15.06 | $177.38 |
| Jo-Carroll Energy | Cooperative | 17,278 | 20.49 | $148.91 |
| Tri-County Electric Cooperative | Cooperative | 16,203 | 16.18 | $200.77 |
| City of St Charles | Municipal | 14,901 | 14.58 | $103.61 |
| Egyptian Electric Cooperative Association | Cooperative | 13,695 | 16.21 | $195.84 |
| Wayne-White Counties Electric Cooperative | Cooperative | 11,792 | 16.39 | $176.00 |
| Eastern Illinois Electric Cooperative | Cooperative | 11,001 | 17.68 | $228.22 |
| City of Batavia | Municipal | 10,072 | 14.04 | $104.92 |
| Shelby Electric Cooperative | Cooperative | 9,882 | 21.54 | $234.14 |
| Rock Energy Cooperative | Cooperative | 9,421 | 14.58 | $125.43 |
| Menard Electric Cooperative | Cooperative | 9,036 | 19.45 | $198.69 |
| City of Geneva | Municipal | 8,675 | 11.68 | $89.89 |
| Coles-Moultrie Electric Cooperative | Cooperative | 8,505 | 17.60 | $205.96 |
| Rochelle Municipal Utilities | Municipal | 5,993 | 13.12 | $83.82 |
| City of Peru | Municipal | 4,793 | 12.48 | $84.03 |
| Mt Carmel Public Utility | Investor-owned | 4,337 | 19.68 | $176.70 |
| Scenic Rivers Energy Cooperative | Cooperative | 12 | 15.49 | $177.06 |
Source: U.S. Energy Information Administration, Form EIA-861 (final 2025 data). Homes in IL counts only the customers in this state. Price and bill cover the utility's whole territory and bundled customers only. Delivery only means the utility carries power but does not sell it.
Who owns Illinois's electric companies
| Type | Utilities | Homes in IL | Share of homes |
|---|---|---|---|
| Investor-owned utility | 4 | 4,894,552 | 93.0% |
| Municipal utility | 7 | 161,025 | 3.1% |
| Electric cooperative | 14 | 206,961 | 3.9% |
Each type is run differently. An investor-owned company answers to shareholders and a state commission. A municipal utility answers to a city. A cooperative answers to its members. That is why the same state can have very different prices and service from one address to the next.
What Illinois utilities charge, by type
| Type | Utilities with a price | Average cents per kWh |
|---|---|---|
| Investor-owned utility | 4 | 16.21 |
| Municipal utility | 7 | 13.71 |
| Electric cooperative | 14 | 16.35 |
Source: U.S. Energy Information Administration, Form EIA-861 (final 2025 data). Customer-weighted average of the prices utilities report for bundled residential service. It leaves out delivery-only customers and retail providers.
Outside the investor-owned companies, the largest municipal utility is City of Springfield (59,366 homes), and the largest electric cooperative is Corn Belt Energy (34,952 homes).
Price differences between types come from costs, customer density and the way each type is financed, so a lower average does not decide which is better for your home.
Utilities with full profiles
These Illinois utilities are among the 600 largest in the country, and each has a profile with its service area, reliability and rate options.
- ProfileComEd3.75 million homes. Investor-owned.Open
- ProfileAmeren Illinois1.06 million homes. Investor-owned.Open
- ProfileMidAmerican Energy717 thousand homes. Investor-owned.Open
- ProfileCity of Springfield59 thousand homes. Municipal.Open
- ProfileCity of Naperville57 thousand homes. Municipal.Open
- ProfileCorn Belt Energy35 thousand homes. Cooperative.Open
- ProfileSouthwestern Electric Cooperative24 thousand homes. Cooperative.Open
- ProfileSoutheastern Illinois Electric Cooperative23 thousand homes. Cooperative.Open
How Illinois compares
The statewide average residential price is 17.67 cents per kWh and the average bill is $126.59 a month. See the full breakdown, rankings and neighbors on the Illinois electricity rates page. Among utilities with at least 10,000 bundled residential customers, average prices ran from 11.08 cents at MidAmerican Energy to 20.49 cents at Jo-Carroll Energy.
Can you switch electric companies in Illinois?
Customers of ComEd and Ameren Illinois can choose an alternative supplier, and many communities buy power for residents through municipal aggregation. Read the Illinois electricity providers guide. Regulation and complaints go through the Illinois Commerce Commission.
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Illinois electric company questions
Who is the largest electric company in Illinois?
ComEd serves the most residential customers in Illinois, about 3.75 million homes in 2025 (EIA Form EIA-861).
How many electric utilities are there in Illinois?
EIA lists 25 electric utilities with residential customers in Illinois for 2025. Most households are served by a handful of the largest ones.
Which Illinois utility has the lowest average price?
Among Illinois utilities with at least 10,000 bundled residential customers, MidAmerican Energy had the lowest average residential price in 2025 at 11.08 cents per kWh and Jo-Carroll Energy had the highest at 20.49 cents. Prices reflect the utility's costs and customer mix, so a lower price does not mean better service.
Can I choose my electric company in Illinois?
Partly. Customers of ComEd and Ameren Illinois can choose an alternative supplier, and many communities buy power for residents through municipal aggregation.