Tri-County Electric Coop, Inc (IL)
Cooperative electric utility · Illinois · #840 of 3,199 U.S. utilities by customers · EIA utility #18955
Tri-County Electric Coop, Inc (IL) is a cooperative electric utility serving 16,612 customers in Illinois. In 2025 it sold 391 gigawatt-hours of electricity for $55.22M in revenue, an average realized rate of 14.11¢ per kWh across all customer classes and 16.18¢ per kWh for residential customers. Its reported service territory covers 10 counties. EIA records its activities as: distribution.
Customers, sales and rates by customer class (2025)
| Class | Customers | Sales (GWh) | Revenue | Avg realized rate | Share of sales |
|---|---|---|---|---|---|
| Residential | 16,203 | 241 | $39.04M | 16.18¢ | |
| Commercial | 353 | 34.0 | $4.70M | 13.82¢ | |
| Industrial | 56 | 116 | $11.48M | 9.90¢ | |
| Total | 16,612 | 391 | $55.22M | 14.11¢ |
Average realized rate = revenue divided by sales as reported on EIA Form 861. It blends fixed charges, demand charges and riders into one per-kWh figure; it is not the utility's tariff rate. Estimated residential bill assumes the average residential customer's actual 2025 usage (1,241 kWh/month).
Five-year trend
| Year | Customers | Sales (GWh) | Revenue | Residential rate |
|---|---|---|---|---|
| 2021 | 16,513 | 380 | $46.90M | 14.04¢ |
| 2022 | 16,561 | 387 | $48.24M | 14.13¢ |
| 2023 | 16,588 | 371 | $49.53M | 15.48¢ |
| 2024 | 16,604 | 376 | $52.33M | 16.04¢ |
| 2025 | 16,612 | 391 | $55.22M | 16.18¢ |
Reliability (2025)
Average outage time (SAIDI): 132 minutes per customer per year
Average outages (SAIFI): 1.64 per customer
Average restoration time (CAIDI): 80 minutes
As reported for Illinois under the IEEE standard, with major event days included where the standard reports them. Lower is better; see the reliability rankings.
Energy supply (2025)
Net generation: 1.3 GWh
Wholesale power purchased: 407 GWh
Winter peak demand: 82 MW
Energy losses: 4.2% of energy handled
Meters & rooftop solar (2025)
Smart (AMI) meters: 99.8% of 16,570 meters
Customer-sited generation (net metering): 95 installations, 0.8 MW of capacity
Counties served
Clay, ILClinton, ILFranklin, ILHamilton, ILJefferson, ILMarion, ILPerry, ILSt Clair, ILWashington, ILWayne, IL
Other large utilities in Illinois
- Commonwealth Edison Co - 3,261,563 customers, residential 17.71¢
- Ameren Illinois Company - 663,709 customers, residential 16.70¢
- MC Squared Energy Services, LLC - 293,923 customers, residential 8.14¢
- Homefield Energy - 160,102 customers, residential 10.64¢
- Energy Services Providers, Inc - 90,477 customers, residential 13.01¢
- Just Energy Solutions Inc. - 80,538 customers, residential 11.33¢
- City of Springfield - (IL) - 70,871 customers, residential 13.09¢
- Residents Energy, LLC - 69,834 customers, residential 17.34¢
All Illinois utilities and rates
Source: U.S. Energy Information Administration, Form EIA-861 2025 (filed by the utility; figures as published). Utility #18955 in the EIA frame.