Electric utilities in Colorado
Every electric utility serving Colorado in EIA data year 2025, with ownership type, grid operator, balancing authority, customers and the counties each one serves.
Retail utilities633 investor-owned, 29 co-ops, 28 municipal
All entities73Including marketers and other filers
Counties covered64With at least one utility listed
Retail customers2,716,615Sum of utility customer counts
Retail electric utilities in Colorado
Sorted by customers. See Colorado on the map, and the state regulator, Colorado Public Utilities Commission.
| Utility | EIA ID | Type | ISO or region | Balancing authority | Customers | Counties served |
|---|---|---|---|---|---|---|
| Public Service Co of ColoradoXcel Energy – Colorado | 15466 | Investor-owned | West (no ISO) | PSCO | 1,478,992 | 56 Adams, Alamosa, Arapahoe, Archuleta, Baca, Bent, Boulder, Chaffee, Clear Creek, Conejos, Costilla, Crowley, Custer, Delta, Denver, Dolores, Douglas, Eagle, Elbert, El Paso, Fremont, Garfield, Gilpin, Grand, Gunnison, Hinsdale, Huerfano, Jefferson, Kiowa, Lake, La Plata, Larimer, Las Animas, Logan, Mesa, Mineral, Moffat, Montezuma, Montrose, Morgan, Otero, Ouray, Park, Pitkin, Prowers, Pueblo, Rio Blanco, Rio Grande, Routt, Saguache, San Miguel, Summit, Teller, Washington, Weld, Yuma |
| City of Colorado Springs - (CO)Colorado Springs Utilities | 3989 | Municipal | West (no ISO) | WACM | 231,570 | 2 El Paso, Teller |
| Intermountain Rural Elec Assn | 9336 | Cooperative | West (no ISO) | PSCO | 158,360 | 11 Adams, Arapahoe, Chaffee, Clear Creek, Douglas, Elbert, El Paso, Fremont, Jefferson, Park, Teller |
| Black Hills Colorado Electric, LLCBlack Hills Energy (Colorado Electric) | 56146 | Investor-owned | West (no ISO) | PSCO | 96,645 | 7 Crowley, Custer, El Paso, Fremont, Otero, Pueblo, Teller |
| United Power, Inc | 19499 | Cooperative | West (no ISO) | WACM | 87,528 | 6 Adams, Boulder, Broomfield, Gilpin, Jefferson, Weld |
| City of Fort Collins - (CO) | 6604 | Municipal | West (no ISO) | PSCO | 74,585 | 1 Larimer |
| Holy Cross Electric Assn, Inc | 8773 | Cooperative | West (no ISO) | PSCO | 57,328 | 5 Eagle, Garfield, Gunnison, Mesa, Pitkin |
| Mountain View Elec Assn, Inc | 13058 | Cooperative | West (no ISO) | WACM | 53,034 | 8 Arapahoe, Crowley, Douglas, Elbert, El Paso, Lincoln, Pueblo, Washington |
| La Plata Electric Assn, Inc | 10539 | Cooperative | West (no ISO) | WACM | 43,337 | 5 Archuleta, Hinsdale, La Plata, Mineral, San Juan |
| Poudre Valley REA, Inc | 15257 | Cooperative | West (no ISO) | WACM | 42,052 | 3 Boulder, Larimer, Weld |
| City of Longmont | 11187 | Municipal | West (no ISO) | PSCO | 40,175 | 2 Boulder, Weld |
| City of Loveland - (CO) | 11256 | Municipal | West (no ISO) | PSCO | 36,984 | 1 Larimer |
| Delta Montrose Electric Assn | 5086 | Cooperative | West (no ISO) | WACM | 33,354 | 4 Delta, Gunnison, Montrose, Ouray |
| Yampa Valley Electric Assn Inc | 21081 | Cooperative | West (no ISO) | PSCO | 26,879 | 5 Eagle, Grand, Moffat, Rio Blanco, Routt |
| San Isabel Electric Assn, Inc | 16616 | Cooperative | West (no ISO) | WACM | 24,296 | 7 Costilla, Custer, Fremont, Huerfano, Las Animas, Otero, Pueblo |
| Mountain Parks Electric, Inc | 13050 | Cooperative | West (no ISO) | WACM | 20,797 | 5 Grand, Jackson, Larimer, Routt, Summit |
| City of Fountain | 6638 | Municipal | West (no ISO) | PSCO | 17,678 | 1 El Paso |
| Grand Valley Power | 7563 | Cooperative | West (no ISO) | PSCO | 17,576 | 3 Delta, Garfield, Mesa |
| Empire Electric Assn, Inc | 5862 | Cooperative | West (no ISO) | WACM | 14,979 | 3 Dolores, Montezuma, San Miguel |
| San Miguel Power Assn, Inc | 16622 | Cooperative | West (no ISO) | WACM | 13,674 | 6 Dolores, Mesa, Montrose, Ouray, San Juan, San Miguel |
| San Luis Valley R E C, Inc | 16603 | Cooperative | West (no ISO) | WACM | 12,633 | 7 Alamosa, Conejos, Costilla, Hinsdale, Mineral, Rio Grande, Saguache |
| Sangre De Cristo Elec Assn Inc | 16649 | Cooperative | West (no ISO) | WACM | 12,510 | 5 Chaffee, Custer, Fremont, Lake, Saguache |
| Gunnison County Elec Assn. | 7787 | Cooperative | West (no ISO) | WACM | 10,915 | 3 Gunnison, Hinsdale, Saguache |
| Town of Estes Park | 5997 | Municipal | West (no ISO) | PSCO | 10,586 | 2 Boulder, Larimer |
| Southeast Colorado Power Assn | 17592 | Cooperative | West (no ISO) | WACM | 10,410 | 11 Baca, Bent, Cheyenne, Crowley, El Paso, Kiowa, Las Animas, Lincoln, Otero, Prowers, Pueblo |
| Y-W Electric Assn Inc | 21075 | Cooperative | West (no ISO) | WACM | 8,817 | 2 Washington, Yuma |
| Highline Electric Assn | 8570 | Cooperative | West (no ISO) | WACM | 8,457 | 7 Logan, Morgan, Phillips, Sedgwick, Washington, Weld, Yuma |
| Morgan County Rural Elec Assn | 12860 | Cooperative | West (no ISO) | WACM | 8,425 | 6 Adams, Arapahoe, Logan, Morgan, Washington, Weld |
| K C Electric Association | 10066 | Cooperative | West (no ISO) | WACM | 6,500 | 4 Cheyenne, Kiowa, Kit Carson, Lincoln |
| City of Glenwood Springs - (CO) | 7300 | Municipal | West (no ISO) | PSCO | 6,211 | 1 Garfield |
| City of Fort Morgan | 6610 | Municipal | West (no ISO) | PSCO | 6,028 | 1 Morgan |
| City of Trinidad - (CO) | 19204 | Municipal | West (no ISO) | WACM | 4,815 | 1 Las Animas |
| City of Gunnison - (CO) | 7826 | Municipal | West (no ISO) | WACM | 4,334 | 1 Gunnison |
| City of Lamar - (CO) | 10633 | Municipal | West (no ISO) | PSCO | 4,259 | 2 Bent, Prowers |
| City of La Junta - (CO) | 10536 | Municipal | West (no ISO) | PSCO | 3,784 | 1 Otero |
| City of Delta - (CO) | 5036 | Municipal | West (no ISO) | WACM | 3,416 | 1 Delta |
| White River Electric Assn, Inc | 20576 | Cooperative | West (no ISO) | WACM | 3,354 | 3 Garfield, Moffat, Rio Blanco |
| City of Aspen- (CO) | 918 | Municipal | West (no ISO) | PSCO | 3,098 | 1 Pitkin |
| Moon Lake Electric Assn Inc | 12866 | Cooperative | West (no ISO) | WACM | 2,272 | 3 Garfield, Moffat, Rio Blanco |
| City of Burlington - (CO) | 2550 | Municipal | West (no ISO) | WACM | 2,162 | 1 Kit Carson |
| City of Las Animas - (CO) | 10730 | Municipal | West (no ISO) | WACM | 1,995 | 1 Bent |
| City of Yuma - (CO) | 21143 | Municipal | West (no ISO) | WACM | 1,647 | 1 Yuma |
| City of Wray | 21021 | Municipal | West (no ISO) | WACM | 1,574 | 1 Yuma |
| City of Holyoke - (CO) | 8777 | Municipal | West (no ISO) | WACM | 1,198 | 1 Phillips |
| City of Springfield - (CO) | 17834 | Municipal | West (no ISO) | WACM | 1,053 | 1 Baca |
| Town of Lyons - (CO) | 11376 | Municipal | West (no ISO) | PSCO | 1,032 | 1 Boulder |
| High West Energy, Inc | 27058 | Cooperative | West (no ISO) | WACM | 1,025 | 3 Larimer, Logan, Weld |
| City of Center - (CO) | 3227 | Municipal | West (no ISO) | PSCO | 941 | 2 Rio Grande, Saguache |
| City of Julesburg - (CO) | 9928 | Municipal | West (no ISO) | WACM | 904 | 1 Sedgwick |
| Town of Oak Creek - (CO) | 14054 | Municipal | West (no ISO) | WACM | 683 | 1 Routt |
| Town of Haxtun - (CO) | 8311 | Municipal | West (no ISO) | WACM | 588 | 1 Phillips |
| Town of Holly - (CO) | 8751 | Municipal | West (no ISO) | WACM | 567 | 1 Prowers |
| Town of Granada - (CO) | 7478 | Municipal | West (no ISO) | WACM | 251 | 1 Prowers |
| Town of Fleming - (CO) | 6418 | Municipal | West (no ISO) | WACM | 233 | 1 Logan |
| Wheatland Electric Coop, Inc | 20510 | Cooperative | SPP | SWPP | 63 | 3 Cheyenne, Kiowa, Prowers |
| Tri-County Electric Coop, Inc | 19160 | Cooperative | SPP | SWPP | 33 | 1 Baca |
| WAPA-- Western Area Power Administration | 27000 | Federal | West (no ISO) | WACM | 11 | 36 Boulder, Broomfield, Chaffee, Clear Creek, Custer, Delta, Dolores, El Paso, Fremont, Garfield, Grand, Gunnison, Jackson, Jefferson, Lake, La Plata, Larimer, Lincoln, Logan, Mesa, Moffat, Montezuma, Montrose, Morgan, Ouray, Phillips, Pueblo, Rio Blanco, Routt, Saguache, San Miguel, Sedgwick, Summit, Washington, Weld, Yuma |
| Southwestern Electric Coop Inc - (NM) | 17715 | Cooperative | West (no ISO) | PNM | 7 | 1 Las Animas |
| Deseret Generation & Tran Coop | 40230 | Cooperative | West (no ISO) | PACE | 1 | 0 — |
| Arkansas River Power Authority | 712 | Public power district | West (no ISO) | — | — | 0 — |
| Platte River Power Authority | 15143 | Public power district | West (no ISO) | — | — | 0 — |
| Redlands Water & Power Company | 15787 | Investor-owned | West (no ISO) | — | — | 0 — |
| Tri-State G & T Assn, Inc | 30151 | Cooperative | West (no ISO) | — | — | 0 — |
Which utilities serve each county in Colorado
Retail power marketers and other entities in Colorado
Competitive suppliers, wholesale marketers, transmission-only companies and behind-the-meter providers that report to EIA for Colorado. They have no county service territory of their own.
| Entity | EIA ID | Type | ISO or region | Customers |
|---|---|---|---|---|
| SolarCity Corporation | 57313 | Behind-the-meter provider | West (no ISO) | 14,509 |
| Sunrun Inc. | 59647 | Behind-the-meter provider | West (no ISO) | 3,174 |
| Palmetto Solar, LLC | 66026 | Behind-the-meter provider | West (no ISO) | 1,670 |
| Spruce Finance | 59943 | Behind-the-meter provider | West (no ISO) | 749 |
| Greenbacker Renewable Energy Corporation | 60025 | Behind-the-meter provider | West (no ISO) | 703 |
| EverBright, LLC | 66036 | Behind-the-meter provider | West (no ISO) | 590 |
| SunPower Capital, LLC | 59580 | Behind-the-meter provider | West (no ISO) | 531 |
| Sunnova | 59579 | Behind-the-meter provider | West (no ISO) | 32 |
| TerraForm US Energy Services, LLC | 60981 | Behind-the-meter provider | West (no ISO) | 13 |
| Scale Sustainable I, LLC | 65242 | Behind-the-meter provider | West (no ISO) | 4 |
About this data
Which utilities exist comes from the U.S. Energy Information Administration’s Form EIA-861 and EIA-861S, data year 2025 (final release, October 7, 2026), read directly from eia.gov. County service territories, balancing authority codes and customer counts come from EIA-861 for 2018, the latest year compiled at county level for this directory; utilities that started reporting after 2018 carry their 2025 values. County boundaries are U.S. Census cartographic boundaries (us-atlas 3.0, Albers USA projection).
Customer counts are per utility within Colorado. A county’s grid operator is the one serving most of its customers, estimated by spreading each utility’s customers evenly over its counties. Download every state in one file from the U.S. Electric Utility Directory.
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