How many coal power plants are in Montana?

4, with 2 GW of nameplate capacity between them, spread over 3 counties. That is the EIA-860M operating count for 2026-07.

Is there a map of Montana coal power plants?

Yes — the map above. Each dot is one coal power plant, sized by nameplate capacity and placed at the coordinates EIA files for it.

Which is the largest coal power plant in Montana?

Colstrip, at 2 GW. The table is sorted largest first, so the rest follow it.

Is there a coal power plant near me in Montana?

The county roll-up below groups every plant by county, which is the quickest way to find the one closest to a given town.

Which grid operator runs Montana's coal power plants?

No single ISO or RTO covers most of them. EIA files each plant against its own balancing authority, which in Montana is largely a vertically integrated utility rather than an organised market.

How current is this, and what is left out?

EIA-860M for 2026-07. Conventional steam coal and integrated gasification combined cycle. Plants below 1 MW are not surveyed by EIA and so are absent; retirements and additions after 2026-07 arrive with the next monthly release.

Coal Power Plants in Montana

Every operating coal power plant in Montana on EIA-860M for 2026-07: 4 plants, 5 generating units and 2 GW of nameplate capacity across 3 counties.

As of 2026-07 (inventory dated 2026-07-31) · EIA-860M Preliminary Monthly Electric Generator Inventory · eia.gov/…/july_generator2026.xlsx · eia.gov/…/eia860m

Plants: 4; 5 generating units
Nameplate capacity: 2 GW
Counties: 3
Grid operator: Mixed; no single ISO covers a majority

Map of coal power plants in Montana

Every one of the 4 plants is drawn at the coordinate EIA files for it.

Loading map…

Coal · 4

List of coal power plants in Montana

Sort by any column. Capacity is nameplate, summed across every generating unit EIA lists at the site.

coal power plants in Montana

ColstripConventional Steam Coal	Talen Montana LLC	Rosebud	1,647.4	2	1984	Operating
Hardin Generator ProjectConventional Steam Coal	Heorot Power Management	Big Horn	115.7	1	2006	Operating
Colstrip Energy LPConventional Steam Coal	Colstrip Energy LP	Rosebud	46.1	1	1990	Operating
Western Sugar Cooperative - BillingsConventional Steam Coal	Western Sugar Cooperative - Billings	Yellowstone	1.5	1	2011	Operating

Largest coal power plants in Montana

1ColstripRosebud County, Montana1,647.4 MW
2Hardin Generator ProjectBig Horn County, Montana115.7 MW
3Colstrip Energy LPRosebud County, Montana46.1 MW
4Western Sugar Cooperative - BillingsYellowstone County, Montana1.5 MW

Coal power plants by county in Montana

The county EIA files against each plant. It is the fastest way to find the plant nearest a given town.

County	Plants	Nameplate MW
Rosebud	2	1,693.5
Big Horn	1	115.7
Yellowstone	1	1.5

Coal Power Plants in Montana: FAQ

How many coal power plants are in Montana?: 4, with 2 GW of nameplate capacity between them, spread over 3 counties. That is the EIA-860M operating count for 2026-07.
Is there a map of Montana coal power plants?: Yes — the map above. Each dot is one coal power plant, sized by nameplate capacity and placed at the coordinates EIA files for it.
Which is the largest coal power plant in Montana?: Colstrip, at 2 GW. The table is sorted largest first, so the rest follow it.
Is there a coal power plant near me in Montana?: The county roll-up below groups every plant by county, which is the quickest way to find the one closest to a given town.
Which grid operator runs Montana's coal power plants?: No single ISO or RTO covers most of them. EIA files each plant against its own balancing authority, which in Montana is largely a vertically integrated utility rather than an organised market.
How current is this, and what is left out?: EIA-860M for 2026-07. Conventional steam coal and integrated gasification combined cycle. Plants below 1 MW are not surveyed by EIA and so are absent; retirements and additions after 2026-07 arrive with the next monthly release.