Idaho Power Co
Investor Owned electric utility · Idaho · #59 of 3,199 U.S. utilities by customers · EIA utility #9191
Idaho Power Co is a investor owned electric utility serving 657,261 customers in Idaho, Oregon. In 2025 it sold 16,180 gigawatt-hours of electricity for $1.57B in revenue, an average realized rate of 9.71¢ per kWh across all customer classes and 11.78¢ per kWh for residential customers. Its reported service territory covers 29 counties. EIA records its activities as: generation, transmission, buying transmission, distribution, wholesale marketing.
Customers, sales and rates by customer class (2025)
| Class | Customers | Sales (GWh) | Revenue | Avg realized rate | Share of sales |
|---|---|---|---|---|---|
| Residential | 554,211 | 6,010 | $708.14M | 11.78¢ | |
| Commercial | 80,326 | 4,389 | $399.93M | 9.11¢ | |
| Industrial | 22,724 | 5,780 | $463.47M | 8.02¢ | |
| Total | 657,261 | 16,180 | $1.57B | 9.71¢ |
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 (904 kWh/month).
Operations by state
| State | Customers | Sales (GWh) | Residential rate |
|---|---|---|---|
| Idaho | 636,949 | 15,504 | 11.78¢ |
| Oregon | 20,312 | 675 | 11.91¢ |
Five-year trend
| Year | Customers | Sales (GWh) | Revenue | Residential rate |
|---|---|---|---|---|
| 2021 | 596,394 | 15,406 | $1.27B | 10.36¢ |
| 2022 | 611,598 | 15,822 | $1.39B | 10.69¢ |
| 2023 | 624,265 | 15,515 | $1.49B | 11.63¢ |
| 2024 | 641,567 | 15,971 | $1.56B | 11.74¢ |
| 2025 | 657,261 | 16,180 | $1.57B | 11.78¢ |
Reliability (2025)
Average outage time (SAIDI): 171 minutes per customer per year
Average outages (SAIFI): 1.03 per customer
Average restoration time (CAIDI): 166 minutes
As reported for Idaho 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: 13,612 GWh
Wholesale power purchased: 6,783 GWh
Winter peak demand: 2,698 MW
Energy losses: 6.9% of energy handled
Meters & rooftop solar (2025)
Smart (AMI) meters: 99.8% of 657,261 meters
Customer-sited generation (net metering): 19,600 installations, 191.6 MW of capacity
Counties served
Ada, IDAdams, IDBaker, ORBannock, IDBingham, IDBlaine, IDBoise, IDCamas, IDCanyon, IDCassia, IDElmore, IDGem, IDGooding, IDGrant, ORHarney, ORIdaho, IDJerome, IDLemhi, IDLincoln, IDMalheur, ORMinidoka, IDOneida, IDOwyhee, IDPayette, IDPower, IDTwin Falls, IDValley, IDWallowa, ORWashington, ID
Other large utilities in Idaho
- City of Idaho Falls - (ID) - 34,150 customers, residential 9.60¢
- Kootenai Electric Cooperative - 33,924 customers, residential 13.43¢
- Northern Lights, Inc - 24,325 customers, residential 12.32¢
- Fall River Rural Elec Coop Inc - 21,316 customers, residential 11.10¢
- Clearwater Power Company - 10,730 customers, residential —
- United Electric Co-op, Inc - (ID) - 7,692 customers, residential 8.50¢
- Raft Rural Elec Coop Inc - 5,418 customers, residential 10.68¢
- City of Burley - (ID) - 5,337 customers, residential —
Source: U.S. Energy Information Administration, Form EIA-861 2025 (filed by the utility; figures as published). Utility #9191 in the EIA frame.