Who runs the utilities in Illinois?
Illinois has 5,233,221 residential customers, EIA-861 2024 sales file (97% of EIA's count). Investor-owned 93.0%. Cooperative 4.0%. Municipal 3.0%. Illinois ranks 10th of 51 states, investor-owned.
Illinois homes by utility type
Illinois: customers by type, %
- 93.0Investor-owned
- 3.0Municipal
- 4.0Cooperative
| Illinois type | Utilities | Customers | Share | Price ¢/kWh | Gap ¢ (%) | kWh/mo | Nonmetro |
|---|---|---|---|---|---|---|---|
| Investor-owned | 2 | 4,866,478 | 93.0% | 15.11 | not shown | 626 | 44% |
| Municipal | 41 | 159,477 | 3.0% | 12.69 | -2.42 (-16%) | 769 | 7% |
| Cooperative | 26 | 207,266 | 4.0% | 15.91 | +0.80 (+5%) | 1,036 | 68% |
| State and federal | 1 | 0 | none | none | not shown | none | no county data |
In Illinois, 1,375,391 customers (26%) are energy-only accounts with a competitive supplier.
Illinois prices by utility type
municipal utilities average 12.7 cents, 2.4 cents (16%) below investor-owned at 15.1; cooperatives average 15.9 cents, 0.8 cents (5%) above investor-owned at 15.1.
Illinois gaps mix cost and customer mix; method.
Illinois: which utilities set the averages
Cooperative at 15.9 cents and municipal utilities at 12.7 are the widest pair in Illinois, 3.2 cents (25%).
Investor-owned: Commonwealth Edison Co holds 83% of priced customers at 15.2 cents, group average 15.1. Among 3 with 5,000+ customers, MidAmerican Energy Co charges 10.0 and Ameren Illinois Company 15.3, 5.3 cents apart.
Municipal: City of Springfield holds 37% of priced customers at 12.0 cents, group average 12.7. Among 6 with 5,000+ customers, City of Geneva- (IL) charges 11.0 and City of St Charles 15.4, 4.3 cents apart.
Cooperative: Corn Belt Energy Corporation holds 17% of priced customers at 15.8 cents, group average 15.9. Among 13 with 5,000+ customers, Southwestern Electric Coop Inc charges 13.7 and Jo-Carroll Energy, Inc 19.8, 6.1 cents apart.
Illinois territory, rural or urban
Illinois has 102 counties, 64% of them nonmetro in USDA's 2023 codes. Customer-weighted: investor-owned territory is 44% nonmetro; municipal territory is 7% nonmetro; cooperative territory is 68% nonmetro.
Illinois: largest utilities
| Commonwealth Edison Co | Investor-owned | 3,727,675 | 15.22 | 583 | 38% |
|---|---|---|---|---|---|
| Ameren Illinois Company | Investor-owned | 1,060,894 | 15.26 | 853 | 69% |
| MidAmerican Energy Co | Investor-owned | 73,582 | 9.99 | 712 | 0% |
| City of Springfield | Municipal | 59,621 | 11.95 | 830 | 0% |
| City of Naperville | Municipal | 56,117 | 12.98 | 762 | 0% |
| Corn Belt Energy Corporation | Cooperative | 34,710 | 15.76 | 914 | 35% |
| Southwestern Electric Coop Inc | Cooperative | 24,822 | 13.68 | 1,124 | 55% |
| Southeastern IL Elec Coop, Inc | Cooperative | 22,731 | 14.47 | 1,146 | 90% |
| Norris Electric Coop | Cooperative | 18,074 | 15.08 | 1,128 | 100% |
| Jo-Carroll Energy, Inc | Cooperative | 17,227 | 19.79 | 708 | 75% |
| Tri-County Electric Coop, Inc (IL) | Cooperative | 16,197 | 16.04 | 1,182 | 80% |
| City of St Charles | Municipal | 14,181 | 15.37 | 668 | 0% |
| Egyptian Electric Coop Assn | Cooperative | 13,707 | 15.54 | 1,128 | 80% |
| Wayne-White Counties Elec Coop | Cooperative | 11,957 | 16.58 | 1,049 | 100% |
| Eastern Illinois Elec Coop | Cooperative | 11,115 | 17.10 | 1,237 | 60% |
| City of Batavia | Municipal | 10,020 | 14.08 | 728 | 0% |
| Shelby Electric Coop, Inc | Cooperative | 9,871 | 18.63 | 1,034 | 78% |
| Rock Energy Cooperative | Cooperative | 9,339 | 14.96 | 746 | 25% |
| Menard Electric Coop | Cooperative | 9,048 | 18.05 | 987 | 50% |
| City of Geneva- (IL) | Municipal | 8,691 | 11.03 | 772 | 0% |
| Coles-Moultrie Electric Coop | Cooperative | 8,456 | 17.14 | 1,119 | 88% |
| Rochelle Municipal Utilities | Municipal | 5,854 | 13.22 | 663 | 100% |
| City of Peru | Municipal | 4,993 | 12.00 | 625 | 100% |
| Mt Carmel Public Utility Co | Investor-owned | 4,327 | 19.13 | 878 | 100% |
| Scenic Rivers Energy Coop | Cooperative | 12 | 13.31 | 965 | 100% |
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Illinois next to its neighbors
Illinois: municipal -16%, cooperative +5% against investor-owned. Gaps are within each state.
More
Similar investor-owned share: Nevada 96%, Hawaii 93%, Massachusetts 91%, Maryland 90%
Sources
Illinois: EIA-861 (2024), USDA RUCC (2023); retrieval dates, checksums.
Questions
Which utility type serves most Illinois homes?
Investor-owned utilities, 93.0% of 5,233,221 customers.
Do Illinois co-ops or municipal utilities charge less?
Municipal utilities averaged 12.7 cents per kWh against 15.1 for investor-owned (-16%). Cooperatives averaged 15.9 cents per kWh against 15.1 for investor-owned (+5%).
How many utilities does Illinois have?
EIA-861 (2024) lists 70; residential sales are reported by 25.
Can Illinois customers pick their utility?
Not the wires: 26% of Illinois customers choose an energy supplier, and the local utility still delivers.