Electricity in Cumberland County, Maine
1 electric utility serves homes in Cumberland County, Maine: Central Maine Power. The average Central Maine Power home paid $147.32 a month in 2025 (27.4¢ per kWh). This page covers 2 cities with 25,000 or more people in the county, from Portland to South Portland.
- 2 cities
- 1 utility
- EIA and Census data, 2025
Electric utilities in Cumberland County
EIA lists utilities by county, not by address. Your address has one utility: its name is on your bill, or type your ZIP code in the utility finder.
| Utility | Homes in Maine | Average bill 2025 | 1,000 kWh now |
|---|---|---|---|
| Central Maine PowerInvestor-owned utility · bill calculator | 584,462 | $147.32538 kWh, 27.4¢ | $268.19 |
The average bill is the 2025 average of each utility's homes that bought their power from it (EIA-861). The Maine average was $147.67 a month.
Cities in Cumberland County
| City | People | City-owned utility | Solar kWh a year per kW |
|---|---|---|---|
| Portland | 69,911 | — | 1,312 |
| South Portland | 27,007 | — | 1,347 |
A city-owned utility is a municipal utility in the county with the city's name (EIA data). Solar output: PVWatts version 8 for a south-facing roof; see the solar savings calculator.
More about Maine: Maine electric rates, all Maine utilities, home energy rebates and natural gas bills.
Who provides electricity in Cumberland County?
1 electric utility serves homes in Cumberland County, Maine: Central Maine Power. The name of your utility is on your bill.
Which cities in Cumberland County are on this page?
Portland and South Portland.
Sources: EIA-861 data, 2025 (utilities by county, homes and average bills); Census Bureau city population estimates, Vintage 2025; PVWatts (National Laboratory of the Rockies).