How many nuclear power plants are in Illinois?

6, with 12 GW of nameplate capacity between them, spread over 6 counties. That is the EIA-860M operating count for 2026-07.

Is there a map of Illinois nuclear power plants?

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

Which is the largest nuclear power plant in Illinois?

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

Is there a nuclear power plant near me in Illinois?

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 Illinois's nuclear power plants?

Most of them sit inside PJM, according to the balancing-authority code EIA files against each plant. Live conditions for that market are on this site.

How current is this, and what is left out?

EIA-860M for 2026-07. EIA technology "Nuclear" — commercial reactors reporting on EIA-860M. 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.

Nuclear Power Plants in Illinois

Every operating nuclear power plant in Illinois on EIA-860M for 2026-07: 6 plants, 11 reactors and 12 GW of nameplate capacity across 6 counties, most of it inside PJM.

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: 6; 11 generating units
Nameplate capacity: 12 GW
Counties: 6
Grid operator: PJM; covers most of these plants

Map of nuclear power plants in Illinois

Every one of the 6 plants is drawn at the coordinate EIA files for it.

Loading map…

Nuclear · 6

List of nuclear power plants in Illinois

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

nuclear power plants in Illinois

Braidwood Generation StationNuclear	Constellation Nuclear	Will	2,449.8	2	1988	Operating
Byron Generating StationNuclear	Constellation Nuclear	Ogle	2,449.8	2	1985	Operating
LaSalle Generating StationNuclear	Constellation Nuclear	LaSalle	2,340	2	1984	Operating
Dresden Generating StationNuclear	Constellation Nuclear	Grundy	2,018.6	2	1970	Operating
Quad Cities Generating StationNuclear	Constellation Nuclear	Rock Island	2,018.6	2	1972	Operating
Clinton Power StationNuclear	Constellation Nuclear	DeWitt	1,138.3	1	1987	Operating

Largest nuclear power plants in Illinois

1Braidwood Generation StationWill County, Illinois2,449.8 MW
2Byron Generating StationOgle County, Illinois2,449.8 MW
3LaSalle Generating StationLaSalle County, Illinois2,340 MW
4Dresden Generating StationGrundy County, Illinois2,018.6 MW
5Quad Cities Generating StationRock Island County, Illinois2,018.6 MW
6Clinton Power StationDeWitt County, Illinois1,138.3 MW

Nuclear power plants by county in Illinois

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

County	Plants	Nameplate MW
Ogle	1	2,449.8
Will	1	2,449.8
LaSalle	1	2,340
Grundy	1	2,018.6
Rock Island	1	2,018.6
DeWitt	1	1,138.3

Nuclear Power Plants in Illinois: FAQ

How many nuclear power plants are in Illinois?: 6, with 12 GW of nameplate capacity between them, spread over 6 counties. That is the EIA-860M operating count for 2026-07.
Is there a map of Illinois nuclear power plants?: Yes — the map above. Each dot is one nuclear power plant, sized by nameplate capacity and placed at the coordinates EIA files for it.
Which is the largest nuclear power plant in Illinois?: Braidwood Generation Station, at 2 GW. The table is sorted largest first, so the rest follow it.
Is there a nuclear power plant near me in Illinois?: 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 Illinois's nuclear power plants?: Most of them sit inside PJM, according to the balancing-authority code EIA files against each plant. Live conditions for that market are on this site.
How current is this, and what is left out?: EIA-860M for 2026-07. EIA technology "Nuclear" — commercial reactors reporting on EIA-860M. 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.