Rates by state / Illinois / Rock Energy Cooperative
Cooperative · 9,421 residential customers
Rock Energy Cooperative electricity rates
Residential customers paid an average of 14.9¢ per kWh in 2025, 21% below the Illinois average of 18.8¢ for the latest 12 months.
Average rate
14.9¢/kWh
2025, all residential revenue ÷ kWh
Average bill
$113/mo
At 762 kWh a month
1-year change
-0.7%
5 years: +11.7%
Average rate by year
202013.3¢
202113.1¢
202214.3¢
202314.6¢
202415.0¢
202514.9¢
Rock Energy Cooperative bill at different usage levels
Estimated monthly bill at Rock Energy Cooperative's 2025 average rate of 14.9¢ per kWh. Actual bills vary with your plan, fixed charges and taxes.
| Monthly use | Rock Energy Cooperative | Illinois average |
|---|---|---|
| 500 kWh | $74 | $94 |
| 750 kWh (about average here) | $111 | $141 |
| 1,000 kWh | $149 | $188 |
| 1,500 kWh | $223 | $282 |
| 2,000 kWh | $297 | $376 |
Other utilities in Illinois
| Utility | Customers | Rate |
|---|---|---|
| Commonwealth Edison Co | 3,753,924 | 17.7¢ |
| Ameren Illinois Company | 1,062,810 | 16.7¢ |
| MC Squared Energy Services, LLC | 263,681 | 17.0¢ |
| Homefield Energy | 147,108 | 19.5¢ |
| Reliant Energy Northeast LLC | 142,167 | 20.8¢ |
| Constellation NewEnergy, Inc | 125,423 | 18.3¢ |
| MidAmerican Energy Co | 73,481 | 10.0¢ |
| City of Springfield - (IL) | 59,366 | 13.1¢ |
Rock Energy Cooperative: common questions
- How much does Rock Energy Cooperative charge per kWh?
- Rock Energy Cooperative residential customers paid an average of 14.9¢ per kWh in 2025, counting all charges, according to EIA Form 861 data.
- What is the average Rock Energy Cooperative electric bill?
- The average Rock Energy Cooperative household used 762 kWh a month in 2025, which works out to about $113 a month at the average rate.
- Is Rock Energy Cooperative cheaper than other utilities in Illinois?
- Rock Energy Cooperative's average rate is 21% below the Illinois average of 18.8¢. 9 of 77 utilities in Illinois have a lower average rate.
- Did Rock Energy Cooperative raise rates?
- Rock Energy Cooperative's average residential rate changed -0.7% from 2024 to 2025 and +11.7% since 2020.
- Is my Rock Energy Cooperative bill too high?
- Enter the kWh and amount from your bill in the free bill check on AverageElectricBill.com. It compares your use with similar Illinois homes and your rate with Rock Energy Cooperative's average.
Got a Rock Energy Cooperative bill?
Check my billSource: U.S. EIA Form EIA-861, 2025 final data.