IL · State grid profile
Illinois power grid
Illinois pairs the largest nuclear category in its portfolio with substantial natural gas, wind, and coal capacity. That balance makes it a useful comparison point for both firm generation and Midwest renewable development.
Final 2024 state totalsPreliminary 2025 facilitiesCommunity-reported data centers
Coverage quality
What is complete here?
Generation portfolio
Illinois capacity by fuel
Oil & gas38.7%19,559 MW
Nuclear24.6%12,415 MW
Wind15.6%7,904 MW
Coal14.7%7,415 MW
Solar5.8%2,954 MW
Storage0.2%100 MW
Industrial & other0.2%78 MW
Biomass0.1%61 MW
Hydro0.1%38 MW
Facility intelligence
Largest Illinois power plants
| Plant | Primary fuel | Location | Utility | Operating capacity |
|---|---|---|---|---|
| Braidwood Generation StationPlant 6022 | Nuclear | Braceville, ILWill County | Constellation Nuclear | 2,450 MW |
| Byron Generating StationPlant 6023 | Nuclear | Byron, ILOgle County | Constellation Nuclear | 2,450 MW |
| LaSalle Generating StationPlant 6026 | Nuclear | Marseilles, ILLaSalle County | Constellation Nuclear | 2,340 MW |
| Dresden Generating StationPlant 869 | Nuclear | Morris, ILGrundy County | Constellation Nuclear | 2,019 MW |
| Quad Cities Generating StationPlant 880 | Nuclear | Cordova, ILRock Island County | Constellation Nuclear | 2,019 MW |
| PowertonPlant 879 | Coal | Pekin, ILTazewell County | Midwest Generations EME LLC | 1,786 MW |
| Prairie State Generating StationPlant 55856 | Coal | Marissa, ILSt Clair County | Prairie State Generating Co LLC | 1,766 MW |
| Kincaid Generation LLCPlant 876 | Coal | Kincaid, ILChristian County | Dynegy Kincaid Generation | 1,319 MW |
| CPV Three Rivers Energy CenterPlant 63931 | Oil & gas | Morris, ILGrundy County | CPV Three Rivers, LLC | 1,300 MW |
| Jackson Generation, LLCPlant 62926 | Oil & gas | Elwood, ILWill County | Jackson Generation, LLC | 1,289 MW |
Methodology
Transparent by design
State totals and fuel mix use finalized EIA-860 2024 generator data. The facility table uses the EIA-860 2025 Early Release and is preliminary. Data-center counts use OpenStreetMap community records and measure mapped coverage, not the full market.