| Big Horn Rural Electric Company | Big Horn and Washakie Counties | 44.25212 | -108.06739 | 75 |
| WYRULEC Electric Company | Goshen County | 42.13799 | -104.33203 | 50 |
| Niobrara Electric Association | Niobrara County | 43.14012 | -104.4419 | 50 |
| Powder River Energy Corporation | Northeast | 44.28359 | -105.54053 | 100 |
| Rocky Mountain Power | Northwest | 43.3859 | -108.29399 | 60 |
| High Plains Power | Operations | 43.13806 | -108.66261 | 125 |
| High West Energy | Operations | 41.34679 | -104.66191 | 40 |
| Basin Electric Power Cooperative | Operations | 42.9957 | -107.5512 | 225 |
| Black Hills Energy | Operations | 42.9957 | -107.5512 | 225 |
| NorthWestern Energy | Yellowstone National Park | 44.58414 | -110.62993 | 45 |
