Electricity in Decatur, Illinois
4 electric utilities serve homes in Macon County, where Decatur is: Ameren Illinois, Corn Belt Energy, Shelby Electric Cooperative and Menard Electric Cooperative. The name of your utility is on your bill. In 2025, the average home bill of these utilities was $147.98 (Corn Belt Energy) to $234.14 (Shelby Electric Cooperative) a month. The Illinois average was $126.59.
- 67,884 people (2025 estimate)
- Macon County
- EIA data, 2025
Electric utilities in Decatur
EIA lists utilities by county, not by city. These utilities serve homes in Macon County. Your address has one utility: its name is on your bill, or type your ZIP code in the utility finder.
| Utility | Homes in Illinois | Average bill 2025 | 1,000 kWh now |
|---|---|---|---|
| Ameren IllinoisInvestor-owned utility · bill calculator | 1,062,810 | $148.32888 kWh, 16.7¢ | $176.29 |
| Corn Belt EnergyElectric cooperative | 34,952 | $147.98949 kWh, 15.6¢ | — |
| Shelby Electric CooperativeElectric cooperative | 9,882 | $234.141,087 kWh, 21.5¢ | — |
| Menard Electric CooperativeElectric cooperative | 9,036 | $198.691,022 kWh, 19.4¢ | — |
The average bill is the 2025 average of each utility's homes that bought their power from it (EIA-861); a dash means that its homes buy power from a retail supplier. The 1,000 kWh bill is from the official tariff, before taxes, for the utilities that have a calculator on this site. The Illinois average was $126.59 a month for 716 kWh (17.7¢ per kWh).
Solar power in Decatur
A home solar system on a south-facing roof in Decatur makes about 1,381 kWh a year for each kW of panels (PVWatts, National Laboratory of the Rockies). A 6 kW system makes about 8,288 kWh a year. See what that saves on your utility's rates with the solar savings calculator.
Lower your electric bill in Decatur
- Open your utility above for its average bill, outages and rates, or the bill calculator to check your own bill.
- Help paying your Ameren Illinois bill: 7 programs, with who qualifies and how to apply.
- Help paying the electric bill in Illinois: bill assistance, payment plans and discounts.
- Why is my electric bill so high? and the appliance cost calculator.
More about Illinois: Illinois electric rates and all Illinois utilities, business electricity rates and natural gas bills. Other cities: Chicago, Aurora, Batavia, Belvidere, Bloomington, Champaign, Cicero, Crystal Lake, Danville, DeKalb, Elgin, Galesburg.
Who provides electricity in Decatur, IL?
4 electric utilities serve homes in Macon County, where Decatur is: Ameren Illinois, Corn Belt Energy, Shelby Electric Cooperative and Menard Electric Cooperative. The name of your utility is on your bill.
What is the average electric bill in Decatur, IL?
In 2025, the average home bill of these utilities was $147.98 (Corn Belt Energy) to $234.14 (Shelby Electric Cooperative) a month. The Illinois average was $126.59 a month for 716 kWh. Your bill depends on your kWh and your rate plan.
utilityratecalc.com is not part of any utility or city government. Sources: Census Bureau city population estimates, Vintage 2025 (the city and its counties); EIA-861 data, 2025 (utilities by county, homes and average bills).