Electricity in Rock County, Wisconsin
6 electric utilities serve homes in Rock County, Wisconsin: We Energies, Alliant Energy (Wisconsin Power and Light), City of Stoughton, Rock Energy Cooperative, City of Evansville and Brodhead Water & Lighting Commission. In 2025, the average home bill of these utilities was $86.27 (City of Stoughton) to $140.90 (Rock Energy Cooperative) a month. This page covers 2 cities with 25,000 or more people in the county, from Janesville to Beloit.
- 2 cities
- 6 utilities
- EIA and Census data, 2025
Electric utilities in Rock County
EIA lists utilities by county, not by address. Your address has one utility: its name is on your bill, or type your ZIP code in the utility finder.
| Utility | Homes in Wisconsin | Average bill 2025 | 1,000 kWh now |
|---|---|---|---|
| We EnergiesInvestor-owned utility · bill calculator | 1,056,086 | $131.37640 kWh, 20.5¢ | $210.74 |
| Alliant Energy (Wisconsin Power and Light)Investor-owned utility · bill calculator | 440,746 | $128.22694 kWh, 18.5¢ | $185.89 |
| City of StoughtonCity utility | 8,338 | $86.27671 kWh, 12.8¢ | — |
| Rock Energy CooperativeElectric cooperative | 7,409 | $140.90984 kWh, 14.3¢ | — |
| City of EvansvilleCity utility | 3,549 | $103.72784 kWh, 13.2¢ | — |
| Brodhead Water & Lighting CommissionCity utility | 1,549 | $96.20714 kWh, 13.5¢ | — |
The average bill is the 2025 average of each utility's homes that bought their power from it (EIA-861). The Wisconsin average was $120.60 a month.
Cities in Rock County
| City | People | City-owned utility | Solar kWh a year per kW |
|---|---|---|---|
| Janesville | 66,929 | — | 1,346 |
| Beloit | 36,649 | — | 1,340 |
A city-owned utility is a municipal utility in the county with the city's name (EIA data). Solar output: PVWatts version 8 for a south-facing roof; see the solar savings calculator.
More about Wisconsin: Wisconsin electric rates, all Wisconsin utilities, home energy rebates and natural gas bills.
Who provides electricity in Rock County?
6 electric utilities serve homes in Rock County, Wisconsin: We Energies, Alliant Energy (Wisconsin Power and Light), City of Stoughton, Rock Energy Cooperative, City of Evansville and Brodhead Water & Lighting Commission. The name of your utility is on your bill.
Which cities in Rock County are on this page?
Janesville and Beloit.
Sources: EIA-861 data, 2025 (utilities by county, homes and average bills); Census Bureau city population estimates, Vintage 2025; PVWatts (National Laboratory of the Rockies).