EIA data through August 2026 · updated 2026-10-29

Rock Energy Cooperative electricity rates

Rock Energy Cooperative (cooperative) residential customers paid about 15.0¢ per kWh (2024 average) — an average bill of $112 for 746 kWh a month.

Avg. home price15.0¢per kWh
Residential customers9,339IL, 2024
Avg. monthly use746kWh
Commercial11.8¢per kWh
Industrial10.8¢per kWh
Illinois has retail electricity choice. Many households can buy electricity supply from a competing supplier, while the local utility still delivers it. The averages here combine utility and supplier sales as reported to the EIA; your state’s public utility commission lists licensed suppliers.

What a month costs with Rock Energy Cooperative

500 kWh / month$75
750 kWh / month · avg. use$112
900 kWh / month$135
1,200 kWh / month$180

Monthly cost at the average price of 15.0¢ per kWh. Real bills add or subtract fixed charges, tiers, time-of-use and fuel adjustments.

Price trend

11¢14¢17¢20¢23¢20222023202420252026Illinois averageU.S. average 11¢14¢17¢20¢23¢20222023202420252026Illinois averageU.S. average
Illinois averageU.S. average
Aug 202619.3¢per kWh
vs. 1 year ago+7.2%18.0¢
vs. 5 years ago+50.4%12.8¢
Record high23.9¢May 2026
Avg. home bill$171886 kWh, Aug
EIA forecast, East North Central19.1¢Dec 2027

Hover or tap the chart for exact monthly values. Source: EIA-861M (monthly, latest months preliminary); forecast: EIA Short-Term Energy Outlook (October 2026) for the East North Central region, which includes Illinois, Indiana, Michigan, Ohio, Wisconsin.

EIA publishes monthly figures only for larger utilities; this one reports yearly, so the chart shows the state.

By state

StateHome price (2024)Avg. billCustomers
Illinois15.0¢$1129,339
Wisconsin14.5¢$1387,310

ZIP codes served

53114Darien53115Delavan53120East Troy53121Elkhorn53125Fontana53128Genoa City53138Honey Creek53147Lake Geneva53148Lyons53157Pell Lake53176Springfield53184Walworth53190Whitewater53191Williams Bay53195Zenda53502Albany53505Avalon53508Belleville53511Beloit53512Beloit53515Black Earth53517Blue Mounds53520Brodhead53521Brooklyn53522Browntown53523Cambridge53525Clinton53527Cottage Grove53528Cross Plains53529Dane53531Deerfield53532Deforest53534Edgerton53536Evansville53537Footville53538Fort Atkinson53542Hanover53545Janesville53546Janesville53547Janesville53548Janesville53550Juda53558Mc Farland53559Marshall53560Mazomanie53562Middleton53563Milton53566Monroe53570Monticello53571Morrisonville53572Mount Horeb53574New Glarus53575Oregon53576Orfordville53585Sharon53589Stoughton53590Sun Prairie53593Verona53596Sun Prairie53597Waunakee53598Windsor53701Madison53702Madison53703Madison53704Madison53705Madison53706Madison53707Madison53708Madison53711Madison53713Madison53714Madison53715Madison53716Madison53717Madison53718Madison53719Madison53725Madison53726Madison53744Madison53774Madison53777Madison53782Madison53783Madison53784Madison53785Madison53786Madison53788Madison53790Madison53791Madison53792Madison53793Madison53794Madison60012Crystal Lake60013Cary60014Crystal Lake60021Fox River Grove60033Harvard60034Hebron60039Crystal Lake60050Mchenry60051Mchenry60071Richmond60072Ringwood60081Spring Grove60097Wonder Lake60098Woodstock60102Algonquin60142Huntley60152Marengo60156Lake In The Hills60180Union61008Belvidere61011Caledonia61012Capron61013Cedarville61016Cherry Valley61018Dakota61019Davis61024Durand61027Eleroy61032Freeport61038Garden Prairie61039German Valley61044Kent61048Lena61050Mc Connell61060Orangeville61062Pearl City61063Pecatonica61065Poplar Grove61067Ridott61070Rock City61072Rockton61073Roscoe61077Seward61079Shirland61080South Beloit61088Winnebago61089Winslow61101Rockford61102Rockford61103Rockford61104Rockford61105Rockford61106Rockford61107Rockford61108Rockford61109Rockford61110Rockford

and 9 more.

Averages, not a quote. Prices here are what each utility’s residential customers paid on average (revenue ÷ kWh sold, fixed charges included), as reported to the U.S. Energy Information Administration. Your own rate depends on your plan, season and usage — check your bill or your utility’s tariff.

Questions

What is Rock Energy Cooperative’s electricity rate?

About 15.0¢ per kWh for residential customers (2024 average, EIA-861), including fixed charges spread over usage.

What is the average Rock Energy Cooperative electric bill?

$112 a month in 2024, for an average of 746 kWh (EIA-861).

Is Rock Energy Cooperative cheaper than the Illinois average?

Yes: 15.0¢ versus the Illinois average of 19.3¢ (Aug 2026).