Electric utilities in Wyoming
Every electric utility serving Wyoming in EIA data year 2025, with ownership type, grid operator, balancing authority, customers and the counties each one serves.
Retail electric utilities in Wyoming
Sorted by customers. See Wyoming on the map, and the state regulator, Wyoming Public Service Commission.
| Utility | EIA ID | Type | ISO or region | Balancing authority | Customers | Counties served |
|---|---|---|---|---|---|---|
| PacifiCorpPacifiCorp (Rocky Mountain Power UT/WY/ID; Pacific Power OR/WA/CA) | 14354 | Investor-owned | West (no ISO) | PACE | 141,091 | 15 Albany, Big Horn, Carbon, Converse, Fremont, Hot Springs, Johnson, Lincoln, Natrona, Park, Platte, Sublette, Sweetwater, Uinta, Washakie |
| Cheyenne Light Fuel & Power d/b/a BlackBlack Hills Energy (Cheyenne Light) | 3461 | Investor-owned | West (no ISO) | WACM | 42,694 | 2 Albany, Laramie |
| Powder River Energy Corp | 19156 | Cooperative | West (no ISO) | WACM | 26,765 | 5 Campbell, Crook, Johnson, Sheridan, Weston |
| Lower Valley Energy Inc | 11273 | Cooperative | West (no ISO) | BPAT | 26,388 | 3 Lincoln, Sublette, Teton |
| Montana-Dakota Utilities CoMontana-Dakota Utilities (MDU) | 12199 | Investor-owned | West (no ISO) | WACM | 15,989 | 2 Johnson, Sheridan |
| City of Gillette - (WY) | 7222 | Municipal | West (no ISO) | WAUW | 15,744 | 2 Campbell, Crook |
| High Plains Power Inc | 8566 | Cooperative | West (no ISO) | WACM | 13,119 | 8 Big Horn, Carbon, Fremont, Hot Springs, Johnson, Natrona, Park, Washakie |
| City of Cody | 3881 | Municipal | West (no ISO) | WACM | 7,491 | 1 Park |
| Carbon Power & Light, Inc | 2998 | Cooperative | West (no ISO) | WACM | 6,234 | 2 Albany, Carbon |
| High West Energy, Inc | 27058 | Cooperative | West (no ISO) | WACM | 6,180 | 2 Albany, Laramie |
| Wyrulec Company | 21079 | Cooperative | West (no ISO) | WACM | 4,783 | 3 Goshen, Laramie, Platte |
| Bridger Valley Elec Assn, Inc | 2215 | Cooperative | West (no ISO) | WACM | 4,699 | 3 Lincoln, Sweetwater, Uinta |
| Wheatland Rural Elec Assn, Inc | 20506 | Cooperative | West (no ISO) | WACM | 3,934 | 4 Albany, Goshen, Laramie, Platte |
| City of Torrington - (WY) | 19032 | Municipal | West (no ISO) | WACM | 3,893 | 1 Goshen |
| Big Horn Rural Electric Co | 1675 | Cooperative | West (no ISO) | WACM | 3,750 | 5 Big Horn, Johnson, Park, Sheridan, Washakie |
| City of Powell - (WY) | 15294 | Municipal | West (no ISO) | WACM | 3,304 | 1 Park |
| Black Hills Power, Inc. d/b/aBlack Hills Energy (South Dakota/Wyoming) | 19545 | Investor-owned | West (no ISO) | WACM | 2,633 | 3 Campbell, Crook, Weston |
| Niobrara Electric Assn, Inc | 13685 | Cooperative | West (no ISO) | WACM | 2,378 | 5 Converse, Goshen, Niobrara, Platte, Weston |
| Town of Wheatland - (WY) | 20512 | Municipal | West (no ISO) | WACM | 2,065 | 1 Platte |
| Garland Light & Power Company | 6950 | Cooperative | West (no ISO) | WACM | 2,054 | 2 Big Horn, Park |
| Town of Lusk - (WY) | 11330 | Municipal | West (no ISO) | WACM | 1,141 | 1 Niobrara |
| Town of Basin - (WY) | 1779 | Municipal | West (no ISO) | PACE | 878 | 1 Big Horn |
| Yampa Valley Electric Assn Inc | 21081 | Cooperative | West (no ISO) | PSCO | 752 | 1 Carbon |
| City of Pine Bluffs - (WY) | 15051 | Municipal | West (no ISO) | WACM | 739 | 1 Laramie |
| Town of Guernsey - (WY) | 7759 | Municipal | West (no ISO) | WACM | 703 | 1 Platte |
| NorthWestern Energy LLC - (MT)NorthWestern Energy (MT) | 12825 | Investor-owned | West (no ISO) | NWMT | 552 | 1 Park |
| Beartooth Electric Coop, Inc | 1417 | Cooperative | West (no ISO) | NWMT | 483 | 1 Park |
| Fall River Rural Elec Coop Inc | 6169 | Cooperative | West (no ISO) | BPAT | 349 | 1 Teton |
| Town of Lingle - (WY) | 11099 | Municipal | West (no ISO) | WACM | 300 | 1 Goshen |
| Big Horn County Elec Coop, Inc | 1683 | Cooperative | West (no ISO) | NWMT | 297 | 1 Sheridan |
| Town of Fort Laramie- (WY) | 6509 | Municipal | West (no ISO) | WACM | 151 | 1 Goshen |
| City of Deaver - (WY) | 4981 | Municipal | West (no ISO) | PACE | 80 | 1 Big Horn |
| Willwood Light & Power Company | 21664 | Cooperative | West (no ISO) | PACE | 49 | 1 Park |
| Southeast Electric Coop, Inc | 17593 | Cooperative | West (no ISO) | WAUW | 11 | 1 Crook |
| Midvale Irrigation District | 31516 | Public power district | West (no ISO) | PACE | 6 | 1 Fremont |
| WAPA-- Western Area Power Administration | 27000 | Federal | West (no ISO) | WACM | 5 | 15 Albany, Big Horn, Carbon, Converse, Fremont, Goshen, Hot Springs, Laramie, Lincoln, Natrona, Niobrara, Park, Platte, Sweetwater, Washakie |
| Basin Electric Power Coop | 1307 | Cooperative | West (no ISO) | WACM | 1 | 1 Park |
| Bonneville Power Administration | 1738 | Federal | West (no ISO) | — | — | 1 Teton |
| Members 1st Power Cooperative | 61300 | Cooperative | SPP | — | — | 0 — |
| Wyoming Municipal Power Agency | 40603 | Joint action / municipal marketing | West (no ISO) | — | — | 0 — |
Which utilities serve each county in Wyoming
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 Wyoming. 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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