Electricity in Boulder County, Colorado
4 electric utilities serve homes in Boulder County, Colorado: Xcel Energy (Colorado), United Power, Poudre Valley REA and City of Longmont. In 2025, the average home bill of these utilities was $88.39 (City of Longmont) to $131.45 (United Power) a month. This page covers 4 cities with 25,000 or more people in the county, from Boulder to Lafayette.
- 4 cities
- 4 utilities
- EIA and Census data, 2025
Electric utilities in Boulder 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 Colorado | Average bill 2025 | 1,000 kWh now |
|---|---|---|---|
| Xcel Energy (Colorado)Investor-owned utility · bill calculator | 1,379,910 | $92.91584 kWh, 15.9¢ | $163.65 |
| United PowerElectric cooperative | 103,104 | $131.45797 kWh, 16.5¢ | — |
| Poudre Valley REAElectric cooperative | 50,933 | $109.05874 kWh, 12.5¢ | — |
| City of LongmontCity utility | 41,483 | $88.39674 kWh, 13.1¢ | — |
3 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). The Colorado average was $103.30 a month.
Cities in Boulder County
| City | People | City-owned utility | Solar kWh a year per kW |
|---|---|---|---|
| Boulder | 105,689 | — | 1,471 |
| Longmont | 100,109 | City of Longmont | 1,490 |
| Erie | 40,904 | — | 1,508 |
| Lafayette | 30,116 | — | 1,516 |
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 Colorado: Colorado electric rates, all Colorado utilities, home energy rebates and natural gas bills.
Who provides electricity in Boulder County?
4 electric utilities serve homes in Boulder County, Colorado: Xcel Energy (Colorado), United Power, Poudre Valley REA and City of Longmont. The name of your utility is on your bill.
Which cities in Boulder County are on this page?
Boulder, Longmont, Erie and Lafayette.
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).