| Colstrip | Coal | Talen Montana LLC | 1.65 GW |
| Libby | Hydroelectric | USACE Northwestern Division | 525 MW |
| Noxon Rapids | Hydroelectric | Avista Corp | 487.8 MW |
| Hungry Horse | Hydroelectric | U S Bureau of Reclamation | 428 MW |
| Clearwater Wind I | Wind | Clearwater Energy Resources LLC | 365.5 MW |
| Yellowtail | Hydroelectric | U S Bureau of Reclamation | 278.2 MW |
| Pryor Mountain Wind | Wind | PacifiCorp | 239.8 MW |
| Selis Ksanka Qlispe | Hydroelectric | Energy Keepers Inc | 227.8 MW |
| Clearwater Wind East | Wind | Clearwater Wind East, LLC | 207.9 MW |
| Yellowstone County Generating Station | Natural Gas | NorthWestern Energy (MT wind/thermal) | 207 MW |
| Dave Gates Generating Station | Natural Gas | NorthWestern Energy (MT wind/thermal) | 203.1 MW |
| NaturEner Rim Rock Energy | Wind | NaturEner Rim Rock Energy LLC | 189 MW |
| Fort Peck | Hydroelectric | USACE-Omaha | 179.7 MW |
| Judith Gap Wind Energy Center | Wind | Invenergy Services LLC | 135 MW |
| Hardin Generator Project | Coal | Heorot Power Management | 115.7 MW |
| Culbertson Generation Station | Natural Gas | Basin Electric Power Coop | 108.2 MW |
| NaturEner Glacier Wind Energy 1 | Wind | NaturEner Glacier Wind Energy 1 LLC | 106.5 MW |
| NaturEner Glacier Wind Energy 2 | Wind | NaturEner Glacier Wind Energy 2 LLC | 103.5 MW |
| Clearwater Wind II | Wind | Clearwater Wind II, LLC | 102.8 MW |
| Clearwater Wind III | Wind | Clearwater Wind III, LLC | 100 MW |
| Thompson Falls | Hydroelectric | NorthWestern Energy (MT Hydro) | 98.1 MW |
| Glendive GT | Natural Gas | Montana-Dakota Utilities Co | 83.7 MW |
| Apex Solar | Solar | Apex Solar LLC | 80 MW |
| MTSUN | Solar | Greenbacker Renewable Energy Corporation | 80 MW |
| South Peak Wind | Wind | ALLETE Clean Energy | 80 MW |
| Stillwater Wind, LLC | Wind | Pattern Operators LP | 79.7 MW |
| Yellowstone Energy LP | Petroleum Coke | Yellowstone Energy LP | 68 MW |
| Morony | Hydroelectric | NorthWestern Energy (MT Hydro) | 63 MW |
| Cochrane | Hydroelectric | NorthWestern Energy (MT Hydro) | 60.4 MW |
| Rainbow (MT) | Hydroelectric | NorthWestern Energy (MT Hydro) | 59 MW |
| Ryan | Hydroelectric | NorthWestern Energy (MT Hydro) | 55.2 MW |
| Canyon Ferry | Hydroelectric | U S Bureau of Reclamation | 55 MW |
| Basin Creek Plant | Natural Gas | Basin Creek Power Services LLC | 54.9 MW |
| Holter | Hydroelectric | NorthWestern Energy (MT Hydro) | 54.6 MW |
| Colstrip Energy LP | Coal | Colstrip Energy LP | 46.1 MW |
| Spion Kop Wind Farm | Wind | NorthWestern Energy (MT wind/thermal) | 40 MW |
| Diamond Willow Wind Facility | Wind | Montana-Dakota Utilities Co | 30 MW |
| OREG 1 Inc | Other | Ormat Nevada Inc | 30 MW |
| OREG 2 Inc | Other | Ormat Nevada Inc | 30 MW |
| Black Eagle | Hydroelectric | NorthWestern Energy (MT Hydro) | 26.7 MW |
| Big Timber Wind Farm | Wind | Consolidated Edison Development Inc. | 25 MW |
| Greenfield Wind - MT | Wind | Greenbacker Renewable Energy Corporation | 25 MW |
| Miles City GT | Natural Gas | Montana-Dakota Utilities Co | 23.3 MW |
| Lewis & Clark | Natural Gas | Montana-Dakota Utilities Co | 18.6 MW |
| Gordon Butte Wind LLC | Wind | Gordon Butte Wind LLC | 17.7 MW |
| Madison Dam | Hydroelectric | NorthWestern Energy (MT Hydro) | 16.4 MW |
| Hauser | Hydroelectric | NorthWestern Energy (MT Hydro) | 16.3 MW |
| Turnbull Hydro | Hydroelectric | Turnbull Hydro LLC | 13 MW |
| Mystic | Hydroelectric | NorthWestern Energy (MT Hydro) | 12 MW |
| Fairfield Wind | Wind | Greenbacker Renewable Energy Corporation | 10 MW |
| Musselshell Wind Project | Wind | Musselshell Wind Project LLC | 10 MW |
| Musselshell Wind Project Two LLC | Wind | Musselshell Wind Project Two LLC | 10 MW |
| Broadwater Power Project | Hydroelectric | Montana Dept-Natural Res&Consv | 9.7 MW |
| Two Dot Wind Farm | Wind | NorthWestern Energy (MT wind/thermal) | 9.7 MW |
| Horseshoe Bend Wind Park | Wind | Cycle Holdings, LLC | 9 MW |
| Tiber Dam Hydroelectric Plant | Hydroelectric | Tiber Montana LLC | 7.5 MW |
| Big Fork | Hydroelectric | PacifiCorp | 4.1 MW |
| Flathead Landfill to Gas Energy Facility | Waste | Flathead Electric Coop Inc | 3.2 MW |
| Black Eagle Solar, LLC | Solar | Adapture Renewables, Inc. | 3 MW |
| Great Divide Solar, LLC | Solar | Adapture Renewables, Inc. | 3 MW |
| Green Meadow Solar, LLC | Solar | Adapture Renewables, Inc. | 3 MW |
| Magpie Solar, LLC | Solar | Adapture Renewables, Inc. | 3 MW |
| South Mills Solar, LLC | Solar | Adapture Renewables, Inc. | 3 MW |
| Stoltze CoGen1 | Biomass | F H Stoltze Land & Lumber Co | 2.8 MW |
| Flint Creek Hydroelectric LLC | Hydroelectric | Hydrodynamics Inc | 2 MW |
| GCC Trident Solar Project | Solar | GCC Trident LLC | 2 MW |
| River Bend Solar, LLC (MT) | Solar | Adapture Renewables, Inc. | 2 MW |
| South Dry Creek Hydro | Hydroelectric | Hydrodynamics Inc | 2 MW |
| Two Dot Wind Broadview East LLC | Wind | Two Dot Wind Broadview East LLC | 1.8 MW |
| Phillips 66 Billings Refinery | Natural Gas | Phillips 66 Billings Refinery | 1.6 MW |
| Western Sugar Cooperative - Billings | Coal | Western Sugar Cooperative - Billings | 1.5 MW |