Southwestern Electric Coop Inc (IL) electricity rates in Illinois, 2025
Southwestern Electric Coop Inc (IL)’s 24,414 residential customers paid an average of 15.37¢ per kWh in 2025, 13% below the Illinois average of 17.67¢. The typical home used 1,160 kWh a month, for an average bill of $178.
- 15.37¢avg ¢/kWh (2025)+1.68¢ (+12.3%) vs 2024
- $178Avg monthly billIllinois: $127
- 1,160 kWhAvg monthly useIllinois: 716 kWh
- 24,414Residential customersFull-service utility
| Sector | Customers | Sales (MWh) | Revenue | ¢/kWh 2025 | ¢/kWh 2024 | Change |
|---|---|---|---|---|---|---|
| Residential | 24,414 | 339,804 | $52,217,200 | 15.37¢ | 13.68¢ | +1.68¢ (+12.3%) |
| Commercial | 450 | 80,300 | $11,450,300 | 14.26¢ | 13.13¢ | +1.13¢ (+8.6%) |
| Industrial | 21 | 106,854 | $10,716,300 | 10.03¢ | 11.60¢ | −1.57¢ (-13.6%) |
| All sectors | 24,885 | 526,958 | $74,383,800 | 14.12¢ | 13.30¢ | +0.82¢ (+6.1%) |
How Southwestern Electric Coop Inc (IL) compares
- Illinois residential average, 2025: 17.67¢ per kWh, 716 kWh a month, $127 average bill. U.S. average: 17.23¢, 874 kWh, $151.
- Among 24 full-service utilities in Illinois with at least 1,000 residential customers, Southwestern Electric Coop Inc (IL) ranks 12 of 24 from lowest to highest average price.
- Latest monthly figure: Illinois homes paid 19.32¢ per kWh in August 2026 (preliminary), against 18.03¢ in August 2025. Summer months often run higher than the annual average.
- From 2024 to 2025 this average rose 12.3%; the state average rose 11.3%.
- Southwestern Electric Coop Inc (IL) is an electric cooperative, owned by the members it serves; its board sets rates. Balancing authority: MISO.
Where Southwestern Electric Coop Inc (IL) serves
EIA lists 11 Illinois counties in its 2025 service territory: Bond, Clay, Clinton, Effingham, Fayette, Macoupin, Madison, Marion, Montgomery, Shelby, St Clair.
51 ZIP codes are matched to Southwestern Electric Coop Inc (IL) in NREL’s 2024 ZIP file: 62001, 62002, 62010, 62011, 62012, 62014, 62017, 62019, 62021, 62025, 62032, 62061, 62067, 62074, 62075, 62080, 62086, 62088, 62091, 62097, 62216, 62231, 62246, 62247, 62249, 62253, 62254, 62262, 62273, 62275, 62281, 62284, 62293, 62294, 62411, 62414, 62418, 62422, 62426, 62431, 62443, 62458, 62461, 62471, 62553, 62838, 62854, 62875, 62880, 62885, 62892. Utility boundaries do not follow ZIP lines, so a ZIP can have more than one provider.
Illinois full-service utilities with similar rates
| Provider | ¢/kWh | Avg bill | Customers |
|---|---|---|---|
| City of St Charles (IL) | 14.58¢ | $104 | 14,901 |
| City of Naperville (IL) | 14.61¢ | $112 | 57,225 |
| Southeastern IL Elec Coop, Inc | 14.80¢ | $181 | 22,607 |
| Rock Energy Cooperative | 14.86¢ | $113 | 9,421 |
| Norris Electric Coop | 15.06¢ | $177 | 18,163 |
| Corn Belt Energy Corporation | 15.59¢ | $148 | 34,952 |
| Tri-County Electric Coop, Inc (IL) | 16.18¢ | $201 | 16,203 |
| Egyptian Electric Coop Assn | 16.21¢ | $196 | 13,695 |
Sources
- U.S. Energy Information Administration, Annual Electric Power Industry Report, Form EIA-861, 2025 final data (f8612025.zip, file dated October 7, 2026): Sales to Ultimate Customers, Average Monthly Bill and Service Territory tables.
- EIA Form EIA-861, 2024 final data (f8612024.zip, file dated December 4, 2025), for the 2024 comparison.
- EIA Electric Power Monthly, Table 5.6.A (average price by state, August 2026 and August 2025; 2026 values are preliminary), file dated October 22, 2026.
- National Renewable Energy Laboratory via OpenEI, U.S. Electric Utility Companies and Rates: Look-up by Zipcode (2024) (investor-owned and other utilities, files dated November 10, 2025), used only to match ZIP codes to utilities.
Average price = residential revenue ÷ residential kWh sold, as reported to EIA. It includes fixed monthly charges, taxes passed through in revenue and seasonal tiers, averaged over the year. Your own rate depends on your tariff and usage.