Illinois electricity rates: ComEd, Ameren and what homes pay
Homes in Illinois paid an average of 18.91¢ per kWh over the last 12 months (Sep 2025–Aug 2026), 4.8% above the US average of 18.04¢; 19.32¢ in August 2026 alone.1 The average residential bill was $126.59 a month in 2025, for 717 kWh.2
EIA monthly data through August 2026 (preliminary, released October 23, 2026); annual data for 2025 are final. Next monthly update expected November 24, 2026. Average revenue per kWh includes fixed charges and riders; it is not a tariff rate.
Midwest region, East North Central division
Illinois homes pay 4.8% above the US average1 per kilowatt-hour over the last 12 months, yet in 2025 their average bill was $24.09 less a month than the US average, because they use comparatively little electricity. That bill is climbing quickly: it rose 15.1% from 2024 to 2025, the 3rd highest2 increase among the states, and the gap between ComEd's north and Ameren's downstate territory shapes what each household pays.
What a kilowatt-hour costs in Illinois, by period
The answer depends on the period. Over the 12 months from September 2025 to August 2026, Illinois homes paid an average of 18.91¢ per kWh, the 16th highest residential price among the 50 states and DC and 0.87¢ per kWh more than the US average. In the single month of August 2026 the average was 19.32¢ per kWh, +7.2%1 on the same month a year earlier; monthly figures since January 2026 are preliminary. For the full year 2025, EIA's final figure is 17.67¢ per kWh3.
These are averages of revenue per kWh: what residential customers paid in total, including fixed monthly charges and riders, divided by the electricity they used. They are not a tariff line, and they cover homes on the utilities' full service and homes buying from suppliers alike.
The monthly average swung widely over the last 12 months, from 16.36¢ per kWh in January 2026 to 23.85¢ per kWh in May 2026. May was also the month of lowest use, 514 kWh1 per home, and fixed monthly charges spread over fewer kWh raise the average per kWh even when no tariff changes.
Of the 6 states bordering Illinois, 5 had a lower residential average over the same 12 months, Kentucky the lowest at 13.94¢ per kWh; Michigan was the highest at 21.28¢ per kWh1.
North Dakota 12.35¢Hawaii 44.27¢
Source: EIA, Electric Power Monthly / EIA-861M sales and revenue by state. Each dot is a state. Residential revenue divided by kilowatt-hours sold over the 12 months 2025-09 to 2026-08 (EIA-861M; months since January 2026 preliminary). Average revenue per kWh, all charges included; not a tariff. Period: September 2025 to August 2026.
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| State | Residential ¢/kWh, 12 months |
|---|---|
| Hawaii | 44.27¢ |
| California | 32.34¢ |
| Massachusetts | 30.39¢ |
| Maine | 29.60¢ |
| Rhode Island | 29.44¢ |
| New York | 28.60¢ |
| Connecticut | 27.42¢ |
| New Hampshire | 26.95¢ |
| Alaska | 26.94¢ |
| District of Columbia | 24.48¢ |
| Vermont | 23.90¢ |
| New Jersey | 23.74¢ |
| Michigan | 21.28¢ |
| Maryland | 21.18¢ |
| Pennsylvania | 20.86¢ |
| Illinois | 18.91¢ |
| Wisconsin | 18.79¢ |
| Ohio | 18.41¢ |
| Delaware | 17.98¢ |
| Indiana | 16.90¢ |
| Virginia | 16.64¢ |
| Colorado | 16.61¢ |
| Alabama | 16.44¢ |
| Minnesota | 16.28¢ |
| Texas | 15.98¢ |
| South Carolina | 15.77¢ |
| Oregon | 15.53¢ |
| West Virginia | 15.53¢ |
| Florida | 15.41¢ |
| Arizona | 15.39¢ |
| New Mexico | 15.31¢ |
| Georgia | 15.17¢ |
| Kansas | 15.13¢ |
| Mississippi | 14.85¢ |
| North Carolina | 14.79¢ |
| South Dakota | 14.28¢ |
| Iowa | 14.20¢ |
| Washington | 14.20¢ |
| Wyoming | 14.01¢ |
| Missouri | 13.97¢ |
| Kentucky | 13.94¢ |
| Montana | 13.94¢ |
| Oklahoma | 13.81¢ |
| Tennessee | 13.61¢ |
| Arkansas | 13.57¢ |
| Nevada | 13.45¢ |
| Utah | 13.26¢ |
| Louisiana | 13.02¢ |
| Idaho | 12.77¢ |
| Nebraska | 12.74¢ |
| North Dakota | 12.35¢ |
Small bills that grew fast
Illinois bills are modest by national standards. The average home used 717 kWh a month in 2025, 17th lowest among the states, and paid $126.59, the 15th lowest2. Electric heat is uncommon: in the Census Bureau's 2025 survey only 18.5% of Illinois homes heated mainly with electricity, against 41.8%4 nationally.
The increase is what stands out. The average bill was $109.99 in 2024, so the 2025 figure is 15.1% higher, against 5.9% for the US. Two things moved together: the annual residential price rose 11.3% (the 4th highest3 increase among the states), and use per home went from 693 kWh5 to 717 kWh2.
Summer still decides the peak. Over the last 12 months use per home was highest at 1,005 kWh in July 2026, 2.0 times the low of May 2026. In August 2026 the average residential bill was $171.18 for 886 kWh1.
Households' own reports agree with EIA's picture. In the 2025 survey, 33.9% of Illinois households paying for electricity said their last bill was under $100, the 8th highest share among the states, while 18.7% reported $250 or more (margin of error ±0.3 percentage points), +3.5 percentage points6 on the 2024 survey. That change is a difference between two estimates, not tested for significance; the survey bills are recalled and include taxes.
Source: Census Bureau, American Community Survey 2025 1-year estimates, table B25132. Households charged for electricity, by the cost they reported for the previous month (American Community Survey 2025, 1-year). Interviews run all year, so this is a typical month, recalled by the household; households whose electricity is included in rent are left out.
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| Under $50 | $50–99 | $100–149 | $150–199 | $200–249 | $250 or more | |
|---|---|---|---|---|---|---|
| Illinois | 8.6% | 25.3% | 21.9% | 15.0% | 10.5% | 18.7% |
| United States | 5.2% | 17.9% | 20.7% | 16.7% | 13.0% | 26.6% |
ComEd's north and Ameren's downstate
Two investor-owned utilities carry most of Illinois's electricity to homes. ComEd has 71.3% of the state's residential customers on its wires across 24 northern counties, Cook County among them; Ameren Illinois has 20.2%7, spread over 818 counties in central and southern Illinois.
Their customers use electricity very differently, and that reverses the price comparison. In 2025, ComEd's bundled residential customers paid 17.71¢ per kWh and Ameren's 16.70¢ per kWh. But the average ComEd home used 606 kWh a month and paid $107.32, while the average Ameren home used 888 kWh and paid $148.327.
ComEd's increase was the larger one. From 2024 to 2025 its bundled price changed +16.4% and its average bill +21.0%; at Ameren the changes were +9.4% and +13.9%7. EIA's monthly sample for the last 12 months (September 2025 to August 2026, preliminary for 2026) shows the price gap widening, 19.33¢ per kWh at ComEd and 17.44¢ per kWh9 at Ameren.
The peak month shows the difference in bills most clearly: Ameren homes averaged 1,193 kWh and $232.34 in July 2026, ComEd homes, at their own peak in July 2026, 864 kWh and $169.729.
Source: EIA-861 annual electric power industry report, 2025 final. EIA-861 2025 final. Average revenue per kWh is all charges divided by kWh; it is not a tariff rate.
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| Utility | average monthly residential bill |
|---|---|
| ComEd (IL) | $107.32 |
| Ameren Illinois (IL) | $148.32 |
Cities, co-ops and the address that decides
In all, 71 utilities report Illinois customers to EIA, 16 of them with 10,000 or more homes on full service. Among those 16, the averages spread widely in 2025, from 9.99¢ per kWh at MidAmerican Energy Co to 20.49¢ per kWh at Jo-Carroll Energy, a gap of 10.50¢ per kWh7.
By ownership, public power systems such as City of Springfield and City of Naperville averaged 13.71¢ per kWh, cooperatives 16.48¢ per kWh and investor-owned utilities 17.32¢ per kWh7. All of these are bundled prices for full service, supply and delivery together.
Source: EIA-861 annual electric power industry report, 2025 final. Utilities with 10,000 or more bundled (full-service) residential customers. Revenue divided by kWh sold, all charges included, EIA-861 2025 final. Darker bars have their own page. In this state, customers who buy supply from a competitive supplier are not in these averages (they pay delivery to the utility and supply to the supplier).
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| Utility | ¢/kWh |
|---|---|
| MidAmerican Energy Co | 9.99¢ |
| City of Springfield | 13.09¢ |
| City of Batavia | 14.04¢ |
| City of St Charles | 14.58¢ |
| City of Naperville | 14.61¢ |
| Southeastern IL Electric Cooperative | 14.80¢ |
| Norris Electric Cooperative | 15.06¢ |
| Southwestern Electric Cooperative | 15.37¢ |
| Corn Belt Energy Corporation | 15.59¢ |
| Tri-County Electric Cooperative | 16.18¢ |
| Egyptian Electric Cooperative Association | 16.21¢ |
| Wayne-White Counties Electric Cooperative | 16.39¢ |
| Ameren Illinois | 16.70¢ |
| Illinois average | 17.67¢ |
| Eastern Illinois Electric Cooperative | 17.68¢ |
| ComEd | 17.71¢ |
| Jo-Carroll Energy | 20.49¢ |
Service areas overlap on the county map. EIA records two or more distribution utilities in 96 of Illinois's 102 counties, and 98 in St. Clair County. There is no single "Chicago rate" or county rate: which utility serves a street is set by its territory boundary, shown on the utility's own map.
Source: EIA-861 2025, service territory; Census Bureau, Cartographic boundary file, counties. Counties where each utility reports serving customers (EIA-861 service territory, 2025). A utility often serves only part of a county, and several can share one: the map shows where each one is present, not street-level boundaries. Point at a county for every utility listed there.
Suppliers and the Price to Compare
Every ComEd and Ameren customer can buy supply from a licensed supplier while the utility keeps delivering the power. In 2025, EIA counted 1,056,781 residential customers, 22.5% of the state's total and the 7th highest share in the country, buying from one of 52 suppliers or aggregation programs; the US share was 15.1%. The Illinois Commerce Commission counted 1,152,94111 residential customers with an alternative supplier in August 2026. Shopping was far more common downstate: 44.7% of Ameren's residential customers against 19.5%7 of ComEd's.
Supplier customers include households enrolled through municipal aggregation, described on the ICC's Plug In Illinois site, in which a city or county chooses a supplier for residents who do not opt out.
The parts of the market cannot be compared on one line. In 2025, customers on the utilities' default service paid 17.07¢ per kWh for supply and delivery together. Supplier customers paid their suppliers 10.75¢ per kWh for supply only, and the utilities billed them 8.83¢ per kWh7 for delivery only. These are averages across all contracts, not offers, and the two parts are not added.
Source: EIA-861 annual electric power industry report, 2025 final. Average revenue per kWh by service part, EIA-861 2025. Supply-only and delivery-only averages each cover only part of a bill and different groups of customers; adding them gives only a rough estimate of what a shopping customer paid in total.
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| Part of the market | ¢/kWh |
|---|---|
| Utility full-service customers (default service): supply and delivery | 17.07¢ |
| Competitive suppliers and CCAs: supply only | 10.75¢ |
| Utility delivery for customers of a supplier: delivery only | 8.83¢ |
The Price to Compare is the reference the ICC publishes for judging a supply offer: the electric supply charge plus the transmission services charge of the utility's default service, residential non-space-heat. For November 2026, ComEd's was 10.103¢ per kWh, against 9.689¢ per kWh a year earlier; Ameren's was 10.441¢ per kWh, against 8.402¢ per kWh. The highest values since January 2017 were 11.049¢ per kWh for ComEd (September 2022) and 12.236¢ per kWh12 for Ameren (October 2022). It excludes distribution charges and the monthly purchased electricity adjustment, so set it against a supplier's price for the same supply and transmission, not against a whole bill. The Illinois retail choice guide covers how offers are compared.
Source: Illinois Commerce Commission, Plug In Illinois, historical Prices to Compare. The residential default-service price for supply and transmission (electric supply charge plus transmission services charge), as published by the Illinois Commerce Commission on Plug In Illinois. It excludes distribution charges and the purchased electricity adjustment, which changes monthly.
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| Month | Price to Compare (¢/kWh) |
|---|---|
| January 2017 | 6.318¢ |
| February 2017 | 6.318¢ |
| March 2017 | 6.318¢ |
| April 2017 | 6.318¢ |
| May 2017 | 6.318¢ |
| June 2017 | 6.892¢ |
| July 2017 | 6.892¢ |
| August 2017 | 6.892¢ |
| September 2017 | 6.892¢ |
| October 2017 | 7.149¢ |
| November 2017 | 7.149¢ |
| December 2017 | 7.149¢ |
| January 2018 | 7.195¢ |
| February 2018 | 7.195¢ |
| March 2018 | 7.195¢ |
| April 2018 | 7.195¢ |
| May 2018 | 7.195¢ |
| June 2018 | 7.358¢ |
| July 2018 | 7.358¢ |
| August 2018 | 7.358¢ |
| September 2018 | 7.356¢ |
| October 2018 | 7.292¢ |
| November 2018 | 7.292¢ |
| December 2018 | 7.292¢ |
| January 2019 | 7.219¢ |
| February 2019 | 7.219¢ |
| March 2019 | 7.219¢ |
| April 2019 | 7.219¢ |
| May 2019 | 7.219¢ |
| June 2019 | 6.725¢ |
| July 2019 | 6.725¢ |
| August 2019 | 6.725¢ |
| September 2019 | 6.723¢ |
| October 2019 | 7.224¢ |
| November 2019 | 7.224¢ |
| December 2019 | 7.224¢ |
| January 2020 | 7.175¢ |
| February 2020 | 7.175¢ |
| March 2020 | 7.175¢ |
| April 2020 | 7.175¢ |
| May 2020 | 7.175¢ |
| June 2020 | 6.473¢ |
| July 2020 | 6.473¢ |
| August 2020 | 6.473¢ |
| September 2020 | 6.473¢ |
| October 2020 | 7.067¢ |
| November 2020 | 7.067¢ |
| December 2020 | 7.067¢ |
| January 2021 | 7.069¢ |
| February 2021 | 7.069¢ |
| March 2021 | 7.069¢ |
| April 2021 | 7.069¢ |
| May 2021 | 7.069¢ |
| June 2021 | 6.776¢ |
| July 2021 | 6.776¢ |
| August 2021 | 6.776¢ |
| September 2021 | 6.776¢ |
| October 2021 | 7.777¢ |
| November 2021 | 7.777¢ |
| December 2021 | 7.777¢ |
| January 2022 | 7.809¢ |
| February 2022 | 7.809¢ |
| March 2022 | 7.809¢ |
| April 2022 | 7.809¢ |
| May 2022 | 7.809¢ |
| June 2022 | 11.041¢ |
| July 2022 | 11.041¢ |
| August 2022 | 11.041¢ |
| September 2022 | 11.049¢ |
| October 2022 | 9.765¢ |
| November 2022 | 9.765¢ |
| December 2022 | 9.765¢ |
| January 2023 | 9.665¢ |
| February 2023 | 9.665¢ |
| March 2023 | 9.665¢ |
| April 2023 | 9.665¢ |
| May 2023 | 9.665¢ |
| June 2023 | 6.809¢ |
| July 2023 | 6.809¢ |
| August 2023 | 6.809¢ |
| September 2023 | 6.799¢ |
| October 2023 | 6.872¢ |
| November 2023 | 6.872¢ |
| December 2023 | 6.872¢ |
| January 2024 | 6.848¢ |
| February 2024 | 6.848¢ |
| March 2024 | 6.848¢ |
| April 2024 | 6.848¢ |
| May 2024 | 6.848¢ |
| June 2024 | 6.900¢ |
| July 2024 | 6.902¢ |
| August 2024 | 6.850¢ |
| September 2024 | 6.850¢ |
| October 2024 | 6.612¢ |
| November 2024 | 6.470¢ |
| December 2024 | 6.470¢ |
| January 2025 | 6.552¢ |
| February 2025 | 6.552¢ |
| March 2025 | 6.552¢ |
| April 2025 | 6.552¢ |
| May 2025 | 6.552¢ |
| June 2025 | 10.028¢ |
| July 2025 | 10.028¢ |
| August 2025 | 10.028¢ |
| September 2025 | 10.027¢ |
| October 2025 | 9.689¢ |
| November 2025 | 9.689¢ |
| December 2025 | 9.689¢ |
| January 2026 | 9.660¢ |
| February 2026 | 9.660¢ |
| March 2026 | 9.660¢ |
| April 2026 | 9.660¢ |
| May 2026 | 9.660¢ |
| June 2026 | 10.399¢ |
| July 2026 | 10.399¢ |
| August 2026 | 10.399¢ |
| September 2026 | 10.400¢ |
| October 2026 | 10.103¢ |
| November 2026 | 10.103¢ |
A doubling since 2001
Illinois's annual residential price was 8.71¢ per kWh13 in 2001 and 17.67¢ per kWh in 2025, a rise of 102.9%, close to the national 100.8%. It rose in 17 of the years since 2002 and last fell in 2018. The recent pace is faster: 35.5%3 since 2020, and over the last 12 months 10.6% above the 12 months before, the 9th highest1 increase among the states.
ComEd's territory sits in the PJM7 wholesale market. Lawrence Berkeley National Laboratory's 2026 review of retail price trends includes Illinois among the PJM states, with an average retail price up 1.2¢ per kWh from 2024 to 2025, and reports that higher PJM capacity prices raised average wholesale costs there by 0.9¢ per kWh in 2025, with a further 0.6¢ per kWh14 expected in 2026.
Source: EIA, Historical state data, annual sales, revenue and customers; EIA, Historical state data, monthly sales and revenue 1990-2009. Average revenue per kWh (all charges, nominal dollars), each calendar year: 2010 onward EIA-861 final annual data, 2001–2009 the sum of the monthly survey.
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| Period | Illinois (¢/kWh) | United States (¢/kWh) |
|---|---|---|
| 2001 | 8.71¢ | 8.58¢ |
| 2002 | 8.39¢ | 8.44¢ |
| 2003 | 8.38¢ | 8.72¢ |
| 2004 | 8.37¢ | 8.95¢ |
| 2005 | 8.34¢ | 9.45¢ |
| 2006 | 8.42¢ | 10.40¢ |
| 2007 | 10.12¢ | 10.65¢ |
| 2008 | 11.07¢ | 11.26¢ |
| 2009 | 11.27¢ | 11.51¢ |
| 2010 | 11.52¢ | 11.54¢ |
| 2011 | 11.78¢ | 11.72¢ |
| 2012 | 11.38¢ | 11.88¢ |
| 2013 | 10.63¢ | 12.13¢ |
| 2014 | 11.91¢ | 12.52¢ |
| 2015 | 12.50¢ | 12.65¢ |
| 2016 | 12.54¢ | 12.55¢ |
| 2017 | 12.95¢ | 12.89¢ |
| 2018 | 12.77¢ | 12.87¢ |
| 2019 | 13.03¢ | 13.01¢ |
| 2020 | 13.04¢ | 13.15¢ |
| 2021 | 13.18¢ | 13.66¢ |
| 2022 | 15.65¢ | 15.04¢ |
| 2023 | 15.71¢ | 16.00¢ |
| 2024 | 15.87¢ | 16.48¢ |
| 2025 | 17.67¢ | 17.23¢ |
Industrial customers pay above the national average. Over the last 12 months the industrial average was 10.18¢ per kWh, 14.3% above the US average1, and in 2025 the average industrial bill was $60,915.51 a month, the 4th highest2 in the country.
Half the power is nuclear
Nuclear plants produced 50.9% of Illinois's electricity in 2025, the 3rd highest share among the states, against 17.7% nationally. Coal fell from 38.0% in 2015 to 16.1%, while natural gas grew to 16.0% and wind to 13.1%. The state's plants generated the equivalent of 141%15 of its retail sales, so the state produces far more electricity than its own customers buy. Supply prices still follow the wholesale market: the Price to Compare is set from the utilities' power purchases, not from the cost of in-state plants.
Source: EIA, Net generation by state by type of producer by energy source. Share of net generation by all power plants located in the state (utilities and independent producers), by energy source. Electricity crosses state lines, so this is what the state produces, not exactly what its customers consume. Pumped storage is a net user of power and is left out.
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| Natural gas | Coal | Nuclear | Hydro | Wind | Solar | Petroleum | Other | |
|---|---|---|---|---|---|---|---|---|
| Illinois, 2025 | 16.0% | 16.1% | 50.9% | 0.1% | 13.1% | 3.5% | 0.0% | 0.3% |
| Illinois, 2015 | 5.6% | 38.0% | 50.2% | 0.1% | 5.5% | 0.0% | 0.0% | 0.6% |
| United States, 2025 | 40.9% | 16.6% | 17.7% | 5.5% | 10.4% | 6.8% | 0.4% | 1.7% |
Outages, meters and help with bills
Illinois customers had 144 minutes without power on average in 2025 counting major storms, 9th lowest among the states, and 62 minutes on ordinary days, the 4th lowest. The two large utilities differed: ComEd customers averaged 77 minutes, Ameren customers 287 minutes16. The power outages ranking compares the states.
Smart meters are nearly universal, 93.3% of residential meters in 2025, and 10.2% of residential customers were enrolled in time-varying pricing, the 10th highest share; both large utilities report real-time pricing and peak-time rebate programs to EIA. In 2025, 119,44217 residential solar installations were net-metered.
Illinois received $199.8 million in federal Low Income Home Energy Assistance Program funds for fiscal 2026, $38.92 per occupied home, and $174.7 million18 in the first release for fiscal 2027. The guide to help paying your electric bill covers how to apply and the other programs that exist.
| ComEd | Investor-owned | 3,753,924 | 17.71¢ | $107.32 | 606 | 8.89¢ |
|---|---|---|---|---|---|---|
| Ameren Illinois | Investor-owned | 1,062,810 | 16.70¢ | $148.32 | 888 | 8.77¢ |
| MidAmerican Energy Co | Investor-owned | 73,481 | 9.99¢ | $74.33 | 744 | – |
| City of Springfield | Municipal | 59,366 | 13.09¢ | $113.16 | 864 | – |
| City of Naperville | Municipal | 57,225 | 14.61¢ | $112.32 | 769 | – |
| Corn Belt Energy Corporation | Cooperative | 34,952 | 15.59¢ | $147.98 | 949 | – |
| Southwestern Electric Cooperative | Cooperative | 24,414 | 15.37¢ | $178.24 | 1,160 | – |
| Southeastern IL Electric Cooperative | Cooperative | 22,607 | 14.80¢ | $180.79 | 1,222 | – |
| Norris Electric Cooperative | Cooperative | 18,163 | 15.06¢ | $177.38 | 1,178 | – |
| Jo-Carroll Energy | Cooperative | 17,278 | 20.49¢ | $148.91 | 727 | – |
| Tri-County Electric Cooperative | Cooperative | 16,203 | 16.18¢ | $200.77 | 1,241 | – |
| City of St Charles | Municipal | 14,901 | 14.58¢ | $103.61 | 711 | – |
| Egyptian Electric Cooperative Association | Cooperative | 13,695 | 16.21¢ | $195.84 | 1,208 | – |
| Wayne-White Counties Electric Cooperative | Cooperative | 11,792 | 16.39¢ | $176.00 | 1,074 | – |
| Southern Illinois Electric Cooperative | Cooperative | 11,216 all | 17.66¢ all customers | – | – | – |
| Eastern Illinois Electric Cooperative | Cooperative | 11,001 | 17.68¢ | $228.22 | 1,291 | – |
| Illinois Rural Electric Cooperative | Cooperative | 10,313 all | 20.71¢ all customers | – | – | – |
| City of Batavia | Municipal | 10,072 | 14.04¢ | $104.92 | 747 | – |
| Shelby Electric Cooperative | Cooperative | 9,882 | 21.54¢ | $234.14 | 1,087 | – |
| M J M Electric Cooperative | Cooperative | 9,591 all | 15.26¢ all customers | – | – | – |
| Rock Energy Cooperative | Cooperative | 9,421 | 14.86¢ | $113.26 | 762 | – |
| Adams Electric Cooperative | Cooperative | 9,163 all | 17.04¢ all customers | – | – | – |
| Menard Electric Cooperative | Cooperative | 9,036 | 19.45¢ | $198.69 | 1,022 | – |
| City of Geneva | Municipal | 8,675 | 11.68¢ | $89.89 | 770 | – |
| Coles-Moultrie Electric Cooperative | Cooperative | 8,505 | 17.60¢ | $205.96 | 1,170 | – |
| Monroe County Electric Cooperative | Cooperative | 7,584 all | 17.87¢ all customers | – | – | – |
| City of Highland | Municipal | 6,912 all | 14.81¢ all customers | – | – | – |
| Village of Chatham | Municipal | 6,421 all | 13.13¢ all customers | – | – | – |
| Clinton County Electric Cooperative | Cooperative | 6,277 all | 14.96¢ all customers | – | – | – |
| Village of Rantoul | Municipal | 6,099 all | 11.62¢ all customers | – | – | – |
| Rural Electric Conven Cooperative | Cooperative | 6,011 all | 14.71¢ all customers | – | – | – |
| Rochelle Municipal Utilities | Municipal | 5,993 | 13.12¢ | $83.82 | 639 | – |
| City of Rock Falls | Municipal | 5,362 all | 18.47¢ all customers | – | – | – |
| Enerstar Power Corp | Cooperative | 5,305 all | 16.26¢ all customers | – | – | – |
| City of Waterloo | Municipal | 5,220 all | 14.09¢ all customers | – | – | – |
| Village of Winnetka | Municipal | 5,044 all | 14.65¢ all customers | – | – | – |
| McDonough Power Cooperative | Cooperative | 4,980 all | 19.05¢ all customers | – | – | – |
| Spoon River Electric Cooperative | Cooperative | 4,890 all | 19.99¢ all customers | – | – | – |
| City of Peru | Municipal | 4,793 | 12.48¢ | $84.03 | 673 | – |
| City of Princeton | Municipal | 4,586 all | 13.29¢ all customers | – | – | – |
| Mt Carmel Public Utility Co | Investor-owned | 4,337 | 19.68¢ | $176.70 | 898 | – |
| City of Mascoutah | Municipal | 4,225 all | 16.98¢ all customers | – | – | – |
| City of Geneseo | Municipal | 3,805 all | 12.20¢ all customers | – | – | – |
| City of Metropolis | Municipal | 3,722 all | 14.77¢ all customers | – | – | – |
| Western Illinois Electric Cooperative | Cooperative | 3,573 all | 15.78¢ all customers | – | – | – |
| Clay Electric Cooperative | Cooperative | 3,261 all | 15.89¢ all customers | – | – | – |
| City of Fairfield | Municipal | 3,241 all | 16.12¢ all customers | – | – | – |
| City of Carmi | Municipal | 3,056 all | 19.87¢ all customers | – | – | – |
| City of Sullivan | Municipal | 3,054 all | 13.99¢ all customers | – | – | – |
| City of Marshall | Municipal | 2,845 all | 13.08¢ all customers | – | – | – |
| City of Flora | Municipal | 2,754 all | 13.27¢ all customers | – | – | – |
| City of Oglesby | Municipal | 2,499 all | 8.61¢ all customers | – | – | – |
| City of Breese | Municipal | 2,469 all | 13.03¢ all customers | – | – | – |
| City of Red Bud | Municipal | 2,367 all | 12.98¢ all customers | – | – | – |
| Village of Freeburg | Municipal | 2,301 all | 15.43¢ all customers | – | – | – |
| City of Carlyle | Municipal | 2,018 all | 12.99¢ all customers | – | – | – |
| City of Casey | Municipal | 1,837 all | 11.47¢ all customers | – | – | – |
| Village of Riverton | Municipal | 1,726 all | 21.70¢ all customers | – | – | – |
| City of Newton | Municipal | 1,633 all | 13.45¢ all customers | – | – | – |
| City of McLeansboro | Municipal | 1,585 all | 18.24¢ all customers | – | – | – |
| City of Bushnell | Municipal | 1,575 all | 12.01¢ all customers | – | – | – |
| City of Altamont | Municipal | 1,507 all | 10.69¢ all customers | – | – | – |
| City of Farmer City | Municipal | 1,261 all | 14.50¢ all customers | – | – | – |
| Cairo Public Utility Company | Municipal | 1,127 all | 12.57¢ all customers | – | – | – |
Source: EIA-861 annual electric power industry report, 2025 final. EIA-861 2025 final; utilities with 1,000 or more residential customers. Price, bill and kWh are for bundled (full-service) residential customers: revenue divided by kWh, all charges included. Delivery only: what the utility billed customers who buy supply from a competitive supplier, per kWh (their supplier's charge comes on top). Small utilities that file EIA's short form report all customers together (marked "all customers").
| Adams County | 4 | Ameren Illinois, Illinois Rural Electric Cooperative, Adams Electric Cooperative, Western Illinois Electric Cooperative |
|---|---|---|
| Alexander County | 3 | Ameren Illinois, Southern Illinois Electric Cooperative, Cairo Public Utility Company |
| Bond County | 4 | Ameren Illinois, Southwestern Electric Cooperative, M J M Electric Cooperative, City of Highland |
| Boone County | 2 | ComEd, Rock Energy Cooperative |
| Brown County | 3 | Ameren Illinois, Illinois Rural Electric Cooperative, Adams Electric Cooperative |
| Bureau County | 5 | ComEd, Ameren Illinois, Corn Belt Energy Corporation, City of Princeton, Village of Ladd |
| Calhoun County | 2 | Ameren Illinois, Illinois Rural Electric Cooperative |
| Carroll County | 2 | ComEd, Jo-Carroll Energy |
| Cass County | 3 | Ameren Illinois, Illinois Rural Electric Cooperative, Menard Electric Cooperative |
| Champaign County | 5 | Ameren Illinois, Corn Belt Energy Corporation, Eastern Illinois Electric Cooperative, Village of Rantoul, University of Illinois |
| Christian County | 3 | Ameren Illinois, Shelby Electric Cooperative, Rural Electric Conven Cooperative |
| Clark County | 6 | Ameren Illinois, Norris Electric Cooperative, Coles-Moultrie Electric Cooperative, Enerstar Power Corp, City of Marshall, City of Casey |
| Clay County | 7 | Ameren Illinois, Southwestern Electric Cooperative, Norris Electric Cooperative, Tri-County Electric Cooperative, Wayne-White Counties Electric Cooperative, Clay Electric Cooperative, City of Flora |
| Clinton County | 7 | Ameren Illinois, Southwestern Electric Cooperative, Tri-County Electric Cooperative, City of Highland, Clinton County Electric Cooperative, City of Breese, City of Carlyle |
| Coles County | 3 | Ameren Illinois, Coles-Moultrie Electric Cooperative, Enerstar Power Corp |
| Cook County | 3 | ComEd, Village of Winnetka, University of Illinois |
| Crawford County | 2 | Ameren Illinois, Norris Electric Cooperative |
| Cumberland County | 5 | Ameren Illinois, Norris Electric Cooperative, Shelby Electric Cooperative, Coles-Moultrie Electric Cooperative, Village of Greenup |
| De Witt County | 3 | Ameren Illinois, Corn Belt Energy Corporation, City of Farmer City |
| DeKalb County | 1 | ComEd |
| Douglas County | 4 | Ameren Illinois, Eastern Illinois Electric Cooperative, Coles-Moultrie Electric Cooperative, Enerstar Power Corp |
| DuPage County | 3 | ComEd, City of Naperville, City of St Charles |
| Edgar County | 4 | Ameren Illinois, Eastern Illinois Electric Cooperative, Coles-Moultrie Electric Cooperative, Enerstar Power Corp |
| Edwards County | 2 | Ameren Illinois, Wayne-White Counties Electric Cooperative |
| Effingham County | 6 | Ameren Illinois, Southwestern Electric Cooperative, Norris Electric Cooperative, Shelby Electric Cooperative, Clay Electric Cooperative, City of Altamont |
| Fayette County | 6 | Ameren Illinois, Southwestern Electric Cooperative, Shelby Electric Cooperative, M J M Electric Cooperative, Clinton County Electric Cooperative, Clay Electric Cooperative |
| Ford County | 4 | ComEd, Ameren Illinois, Corn Belt Energy Corporation, Eastern Illinois Electric Cooperative |
| Franklin County | 5 | Ameren Illinois, Southeastern IL Electric Cooperative, Tri-County Electric Cooperative, Egyptian Electric Cooperative Association, Wayne-White Counties Electric Cooperative |
| Fulton County | 3 | Ameren Illinois, McDonough Power Cooperative, Spoon River Electric Cooperative |
| Gallatin County | 3 | Ameren Illinois, Southeastern IL Electric Cooperative, Wayne-White Counties Electric Cooperative |
| Greene County | 4 | Ameren Illinois, Illinois Rural Electric Cooperative, M J M Electric Cooperative, City of Roodhouse |
| Grundy County | 1 | ComEd |
| Hamilton County | 4 | Southeastern IL Electric Cooperative, Tri-County Electric Cooperative, Wayne-White Counties Electric Cooperative, City of McLeansboro |
| Hancock County | 4 | Ameren Illinois, Adams Electric Cooperative, McDonough Power Cooperative, Western Illinois Electric Cooperative |
| Hardin County | 1 | Southeastern IL Electric Cooperative |
| Henderson County | 3 | Ameren Illinois, McDonough Power Cooperative, Western Illinois Electric Cooperative |
| Henry County | 5 | Ameren Illinois, MidAmerican Energy Co, Corn Belt Energy Corporation, Jo-Carroll Energy, City of Geneseo |
| Iroquois County | 2 | Ameren Illinois, Eastern Illinois Electric Cooperative |
| Jackson County | 3 | Ameren Illinois, Egyptian Electric Cooperative Association, Southern Illinois Electric Cooperative |
| Jasper County | 4 | Ameren Illinois, Norris Electric Cooperative, Clay Electric Cooperative, City of Newton |
| Jefferson County | 3 | Ameren Illinois, Tri-County Electric Cooperative, Wayne-White Counties Electric Cooperative |
| Jersey County | 3 | Ameren Illinois, Illinois Rural Electric Cooperative, M J M Electric Cooperative |
| Jo Daviess County | 3 | ComEd, Jo-Carroll Energy, Scenic Rivers Energy Cooperative |
| Johnson County | 4 | Ameren Illinois, Southeastern IL Electric Cooperative, Egyptian Electric Cooperative Association, Southern Illinois Electric Cooperative |
| Kane County | 4 | ComEd, City of St Charles, City of Batavia, City of Geneva |
| Kankakee County | 1 | ComEd |
| Kendall County | 3 | ComEd, Ameren Illinois, Corn Belt Energy Corporation |
| Knox County | 4 | Ameren Illinois, Corn Belt Energy Corporation, McDonough Power Cooperative, Spoon River Electric Cooperative |
| Lake County | 1 | ComEd |
| LaSalle County | 5 | ComEd, Ameren Illinois, Corn Belt Energy Corporation, City of Peru, City of Oglesby |
| Lawrence County | 2 | Ameren Illinois, Norris Electric Cooperative |
| Lee County | 2 | ComEd, Rochelle Municipal Utilities |
| Livingston County | 4 | ComEd, Ameren Illinois, Corn Belt Energy Corporation, Eastern Illinois Electric Cooperative |
| Logan County | 3 | Ameren Illinois, Corn Belt Energy Corporation, Menard Electric Cooperative |
| Macon County | 4 | Ameren Illinois, Corn Belt Energy Corporation, Shelby Electric Cooperative, Menard Electric Cooperative |
| Macoupin County | 5 | Ameren Illinois, Southwestern Electric Cooperative, Illinois Rural Electric Cooperative, M J M Electric Cooperative, Rural Electric Conven Cooperative |
| Madison County | 5 | Ameren Illinois, Southwestern Electric Cooperative, M J M Electric Cooperative, City of Highland, Clinton County Electric Cooperative |
| Marion County | 6 | Ameren Illinois, Southwestern Electric Cooperative, Tri-County Electric Cooperative, Wayne-White Counties Electric Cooperative, Clinton County Electric Cooperative, Clay Electric Cooperative |
| Marshall County | 3 | ComEd, Ameren Illinois, Corn Belt Energy Corporation |
| Mason County | 2 | Ameren Illinois, Menard Electric Cooperative |
| Massac County | 4 | Ameren Illinois, Southeastern IL Electric Cooperative, Southern Illinois Electric Cooperative, City of Metropolis |
| McDonough County | 6 | Ameren Illinois, Adams Electric Cooperative, McDonough Power Cooperative, Spoon River Electric Cooperative, Western Illinois Electric Cooperative, City of Bushnell |
| McHenry County | 2 | ComEd, Rock Energy Cooperative |
| McLean County | 3 | Ameren Illinois, Corn Belt Energy Corporation, Eastern Illinois Electric Cooperative |
| Menard County | 2 | Ameren Illinois, Menard Electric Cooperative |
| Mercer County | 2 | Ameren Illinois, MidAmerican Energy Co |
| Monroe County | 4 | Ameren Illinois, Egyptian Electric Cooperative Association, Monroe County Electric Cooperative, City of Waterloo |
| Montgomery County | 5 | Ameren Illinois, Southwestern Electric Cooperative, Shelby Electric Cooperative, M J M Electric Cooperative, Rural Electric Conven Cooperative |
| Morgan County | 4 | Ameren Illinois, Illinois Rural Electric Cooperative, Menard Electric Cooperative, Rural Electric Conven Cooperative |
| Moultrie County | 6 | Ameren Illinois, Eastern Illinois Electric Cooperative, Shelby Electric Cooperative, Coles-Moultrie Electric Cooperative, City of Sullivan, Village of Bethany |
| Ogle County | 2 | ComEd, Rochelle Municipal Utilities |
| Peoria County | 2 | Ameren Illinois, Spoon River Electric Cooperative |
| Perry County | 3 | Ameren Illinois, Tri-County Electric Cooperative, Egyptian Electric Cooperative Association |
| Piatt County | 4 | Ameren Illinois, Corn Belt Energy Corporation, Eastern Illinois Electric Cooperative, Coles-Moultrie Electric Cooperative |
| Pike County | 3 | Ameren Illinois, Illinois Rural Electric Cooperative, Adams Electric Cooperative |
| Pope County | 2 | Southeastern IL Electric Cooperative, Southern Illinois Electric Cooperative |
| Pulaski County | 3 | Ameren Illinois, Southern Illinois Electric Cooperative, Cairo Public Utility Company |
| Putnam County | 2 | Ameren Illinois, Corn Belt Energy Corporation |
| Randolph County | 4 | Ameren Illinois, Egyptian Electric Cooperative Association, Monroe County Electric Cooperative, City of Red Bud |
| Richland County | 4 | Ameren Illinois, Norris Electric Cooperative, Wayne-White Counties Electric Cooperative, Clay Electric Cooperative |
| Rock Island County | 1 | MidAmerican Energy Co |
| Saline County | 2 | Ameren Illinois, Southeastern IL Electric Cooperative |
| Sangamon County | 7 | Ameren Illinois, City of Springfield, Shelby Electric Cooperative, Menard Electric Cooperative, Village of Chatham, Rural Electric Conven Cooperative, Village of Riverton |
| Schuyler County | 4 | Ameren Illinois, Adams Electric Cooperative, McDonough Power Cooperative, Spoon River Electric Cooperative |
| Scott County | 2 | Ameren Illinois, Illinois Rural Electric Cooperative |
| Shelby County | 5 | Ameren Illinois, Southwestern Electric Cooperative, Norris Electric Cooperative, Shelby Electric Cooperative, Coles-Moultrie Electric Cooperative |
| St. Clair County | 9 | Ameren Illinois, Southwestern Electric Cooperative, Tri-County Electric Cooperative, Egyptian Electric Cooperative Association, Monroe County Electric Cooperative, City of Highland, Clinton County Electric Cooperative, City of Mascoutah, Village of Freeburg |
| Stark County | 2 | Ameren Illinois, Corn Belt Energy Corporation |
| Stephenson County | 3 | ComEd, Rock Energy Cooperative, Scenic Rivers Energy Cooperative |
| Tazewell County | 3 | Ameren Illinois, Corn Belt Energy Corporation, Menard Electric Cooperative |
| Union County | 3 | Ameren Illinois, Egyptian Electric Cooperative Association, Southern Illinois Electric Cooperative |
| Vermilion County | 3 | Ameren Illinois, Eastern Illinois Electric Cooperative, Enerstar Power Corp |
| Wabash County | 5 | Ameren Illinois, Norris Electric Cooperative, Wayne-White Counties Electric Cooperative, Mt Carmel Public Utility Co, City of Allendale |
| Warren County | 2 | Ameren Illinois, McDonough Power Cooperative |
| Washington County | 4 | Ameren Illinois, Tri-County Electric Cooperative, Egyptian Electric Cooperative Association, Clinton County Electric Cooperative |
| Wayne County | 5 | Ameren Illinois, Tri-County Electric Cooperative, Wayne-White Counties Electric Cooperative, Clay Electric Cooperative, City of Fairfield |
| White County | 4 | Ameren Illinois, Southeastern IL Electric Cooperative, Wayne-White Counties Electric Cooperative, City of Carmi |
| Whiteside County | 4 | ComEd, Jo-Carroll Energy, City of Rock Falls, City of Albany |
| Will County | 2 | ComEd, City of Naperville |
| Williamson County | 4 | Ameren Illinois, Southeastern IL Electric Cooperative, Egyptian Electric Cooperative Association, Southern Illinois Electric Cooperative |
| Winnebago County | 2 | ComEd, Rock Energy Cooperative |
| Woodford County | 3 | ComEd, Ameren Illinois, Corn Belt Energy Corporation |
Source: EIA-861 2025, service territory. Distribution utilities that report customers in the county (EIA-861 2025 service territory), largest first. Several utilities can serve parts of the same county; for a specific address, the utilities' own service-area maps decide.
Illinois electricity questions
What is the average cost per kWh in Illinois?
Over the last 12 months (September 2025 to August 2026), Illinois homes paid an average of 18.91¢ per kWh, all charges included and taxes mostly excluded. Preliminary data put August 2026 at 19.32¢ per kWh1. The 2025 annual average was 17.67¢ per kWh, against 15.87¢ per kWh3 in 2024.
What is the average electric bill in Illinois?
EIA puts it at $126.59 a month in 2025, for 717 kWh2 of electricity, up from $109.995 in 2024. Computed over the last 12 months, it was $131.831. Households reported a median of about $1376 for their last monthly bill in the Census Bureau's 2025 survey.
Is ComEd or Ameren Illinois cheaper?
Per kWh, Ameren Illinois was lower in 2025: its bundled residential customers paid 16.70¢ per kWh, ComEd's 17.71¢ per kWh. Per month, ComEd was lower ($107.32 against $148.327) because its customers used less electricity. You cannot choose between them: your address decides the delivery utility.
What is the Price to Compare in Illinois?
It is the per-kWh price of the supply and transmission parts of the utility's default service, published by the Illinois Commerce Commission on Plug In Illinois. For November 2026 it was 10.103¢ per kWh for ComEd and 10.441¢ per kWh12 for Ameren Illinois (residential, non-space-heat). It excludes distribution charges and the monthly purchased electricity adjustment, so it is the figure to set against a supplier's supply price, not against a whole bill.
More on electricity in and around Illinois
Utility pages: ComEd and Ameren Illinois.
How shopping for a supplier works here: retail choice in Illinois.
Neighboring states: Indiana, Iowa, Kentucky, Michigan, Missouri and Wisconsin. Put Illinois side by side with another state in the comparison tool, or estimate a bill with your own kWh in the bill calculator.
| Ranking | Value | Rank |
|---|---|---|
| Cheapest electricity by state | 18.91¢ | 36th of 51 (1 = lowest) |
| Average electric bill by state | $126.59 | 37th of 51 |
| Average electricity usage by state | 717 | 35th of 51 |
| Electricity price increases by state | +10.6% | 9th of 51 |
| Commercial electricity rates by state | 13.81¢ | tied 35th of 51 (1 = lowest) |
| Industrial electricity rates by state | 10.18¢ | 37th of 51 (1 = lowest) |
| Power outages by state | 144 | 43rd of 51 |
| Renewable electricity by state | 16.8% | 27th of 51 |
| Rooftop solar on net metering by state | 22.0 | 23rd of 51 |
Sources
- EIA, Electric Power Monthly / EIA-861M sales and revenue by state; table sales_revenue.xlsx (EPM Table 5.6.A); January 2001 to 2026-08; months since January 2026 preliminary; released October 23, 2026. www.eia.gov
- EIA-861 2025, average monthly bill by state; table Average_Bill_2025; 2025, final; released October 7, 2026. www.eia.gov
- EIA, Historical state data, annual sales, revenue and customers; table HS861 2010-.xlsx; 2010-2025, final; released October 7, 2026. www.eia.gov
- Census Bureau, American Community Survey 2025 1-year estimates, house heating fuel, table B25040; 2025; released October 29, 2026. data.census.gov
- EIA, Electric Sales, Revenue, and Average Price 2024, Table 5A; 2024 (last edition of this product); released October 7, 2025. www.eia.gov
- Census Bureau, American Community Survey 2025 1-year estimates, table B25132; 2025; released October 29, 2026. data.census.gov
- EIA-861 annual electric power industry report, 2025 final; table Sales_Ult_Cust_2025; 2025, final; released October 7, 2026. www.eia.gov
- EIA-861 2025, service territory; table Service_Territory_2025; 2025, final; released October 7, 2026. www.eia.gov
- EIA-861M monthly sales and revenue by utility; table sales_ult_cust_2025 and _2026; released October 23, 2026. www.eia.gov
- Census Bureau, Cartographic boundary file, counties; table cb_2025_us_county_5m; cb_2021_us_county_5m; 2025 (2021 for Connecticut). www.census.gov
- Illinois Commerce Commission, Residential switching statistics; table Residential Switching Stats for PlugIn; August 2026. icc.illinois.gov
- Illinois Commerce Commission, Plug In Illinois, historical Prices to Compare; table Historical Prices to Compare workbook; through November 2026. plugin.illinois.gov
- EIA, Historical state data, monthly sales and revenue 1990-2009; table HS861M 1990-2009.xlsx; 1990-2009, final. www.eia.gov
- Lawrence Berkeley National Laboratory, Retail Electricity Price Trends and Drivers; table July 2026 update; 2025 data. eta-publications.lbl.gov
- EIA, Net generation by state by type of producer by energy source; table annual_generation_state.xlsx; 1990-2025; released September 14, 2026. www.eia.gov
- EIA-861 2025, reliability; table Reliability_2025; 2025, final; released October 7, 2026. www.eia.gov
- EIA-861 2025, advanced meters, dynamic pricing and net metering; table Advanced_Meters, Dynamic_Pricing, Net_Metering 2025; 2025, final; released October 7, 2026. www.eia.gov
- HHS, LIHEAP funding releases to states; table FY2027 first release; FY2026 final; FY2027 first release (October 9, 2026); FY2026 total; released October 9, 2026. acf.gov
Margins of error (±) are at the 90% confidence level. A difference is called significant only when it passes the Census Bureau's test at that level. How every figure is built: methodology. Found an error? Write to [email protected]; corrections are listed on the updates page.