Electricity in Lewiston, Idaho
Avista is the main electric utility in Nez Perce County, where Lewiston is. The average Avista home paid $106.63 a month in 2025 (11.8¢ per kWh). The Idaho average was $110.36.
- 34,717 people (2025 estimate)
- Nez Perce County
- EIA data, 2025
Electric utilities in Lewiston
| Utility | Homes in Idaho | Average bill 2025 | 1,000 kWh now |
|---|---|---|---|
| AvistaInvestor-owned utility | 129,181 | $106.63900 kWh, 11.8¢ | — |
2 smaller utilities with fewer than 1,000 homes are also listed in the county. The average bill is the 2025 average of each utility's homes that bought their power from it (EIA-861); a dash means that its homes buy power from a retail supplier. The 1,000 kWh bill is from the official tariff, before taxes, for the utilities that have a calculator on this site. The Idaho average was $110.36 a month for 933 kWh (11.8¢ per kWh).
Solar power in Lewiston
A home solar system on a south-facing roof in Lewiston makes about 1,265 kWh a year for each kW of panels (PVWatts, National Laboratory of the Rockies). A 6 kW system makes about 7,592 kWh a year. See what that saves on your utility's rates with the solar savings calculator.
Lower your electric bill in Lewiston
- Open your utility above for its average bill, outages and rates.
- Help paying the electric bill in Idaho: bill assistance, payment plans and discounts.
- Why is my electric bill so high? and the appliance cost calculator.
More about Idaho: Idaho electric rates and all Idaho utilities, business electricity rates and natural gas bills. Other cities: Boise, Coeur d'Alene, Idaho Falls, Meridian, Moscow, Nampa, Pocatello, Rexburg, Twin Falls.
Who provides electricity in Lewiston, ID?
Avista is the main electric utility in Nez Perce County, where Lewiston is.
What is the average electric bill in Lewiston, ID?
The average Avista home paid $106.63 a month in 2025 (11.8¢ per kWh). The Idaho average was $110.36 a month for 933 kWh. Your bill depends on your kWh and your rate plan.
utilityratecalc.com is not part of any utility or city government. Sources: Census Bureau city population estimates, Vintage 2025 (the city and its counties); EIA-861 data, 2025 (utilities by county, homes and average bills).