How ComEd compares with the utilities next door
| Utility | 2024 ¢/kWh | Customers | Δ vs ComEd, ¢/kWh | $/yr difference |
|---|---|---|---|---|
| City of Geneva | 11.03 | 8,691 | -4.18 | -$452 |
| City of Naperville | 12.98 | 56,117 | -2.24 | -$242 |
| Rochelle Municipal Utilities | 13.22 | 5,854 | -2.00 | -$216 |
| City of Batavia | 14.08 | 10,020 | -1.13 | -$122 |
| Rock Energy Cooperative | 14.96 | 9,339 | -0.25 | -$27 |
| Commonwealth Edison (ComEd) (this page) | 15.22 | 2,922,223 | — | — |
| Ameren Illinois Company | 15.26 | 520,498 | +0.04 | +$4 |
| City of St Charles | 15.37 | 14,181 | +0.15 | +$16 |
| Corn Belt Energy Corporation | 15.76 | 34,710 | +0.54 | +$59 |
| Eastern Illinois Elec Coop | 17.10 | 11,115 | +1.88 | +$203 |
| Jo-Carroll Energy, Inc | 19.79 | 17,227 | +4.57 | +$494 |
10 bundled utilities (≥5,000 customers) share at least one county with ComEd. Positive $/yr = that utility's customers pay more than ComEd 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 ComEd customers pay more (county benchmark)
| County | Cheapest utility in county | Their ¢/kWh | ComEd premium, $/yr |
|---|---|---|---|
| Cook | MidAmerican Energy Co | 9.99 | +$564 |
| DeKalb | MidAmerican Energy Co | 9.99 | +$564 |
| Grundy | MidAmerican Energy Co | 9.99 | +$564 |
| Kankakee | MidAmerican Energy Co | 9.99 | +$564 |
| Lake | MidAmerican Energy Co | 9.99 | +$564 |
| Kane | City of Geneva | 11.03 | +$452 |
| LaSalle | City of Peru | 12.00 | +$347 |
| DuPage | City of Naperville | 12.98 | +$242 |
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 24 served.
Rate trend and size
| Metric | 2023 | 2024 | Change |
|---|---|---|---|
| Average price, ¢/kWh | 14.78 | 15.22 | +3.0% |
| Residential customers | 3,006,545 | 2,922,223 | -2.8% |
Ownership: Investor Owned. Including delivery-only/third-party-supply accounts, ComEd serves 3,727,675 residential customers in IL. Statewide context: Illinois electricity rates.
Supply vs delivery on a ComEd bill
Illinois has residential electric supply choice: ComEd 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)
Boone · Bureau · Carroll · Cook · DeKalb · DuPage · Ford · Grundy · Jo Daviess · Kane · Kankakee · Kendall · LaSalle · Lake · Lee · Livingston · Marshall · McHenry · Ogle · Stephenson · Whiteside · Will · Winnebago · Woodford
Head-to-head comparisons
- Commonwealth Edison (ComEd) vs Ameren Illinois Company
- Commonwealth Edison (ComEd) vs City of Naperville
Questions people ask
- Is Commonwealth Edison (ComEd) more expensive than other Illinois utilities?
- Commonwealth Edison (ComEd) customers paid an average 15.22 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 Commonwealth Edison (ComEd)?
- 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 Commonwealth Edison (ComEd) have?
- 2,922,223 residential customers in Illinois in 2024 across 24 counties, per its EIA-861 federal filing. Ownership type: investor-owned.