Directory of Power Plants in Illinois
| County | State Rank | Active Plants | Mar 2025 Generation |
|---|
| Will County, IL | # 1 | 33 | 28.1 TWh |
| Grundy County, IL | # 2 | 10 | 22.1 TWh |
| LaSalle County, IL | # 3 | 17 | 20.6 TWh |
| Ogle County, IL | # 4 | 11 | 19.8 TWh |
| Rock Island County, IL | # 5 | 7 | 16.0 TWh |
| St. Clair County, IL | # 6 | 6 | 11.3 TWh |
| De Witt County, IL | # 7 | 4 | 10.2 TWh |
| Randolph County, IL | # 8 | 5 | 7.0 TWh |
| Kendall County, IL | # 9 | 2 | 5.3 TWh |
| Lee County, IL | # 10 | 12 | 5.2 TWh |
| McLean County, IL | # 11 | 14 | 3.2 TWh |
| Tazewell County, IL | # 12 | 7 | 3.1 TWh |
| Jasper County, IL | # 13 | 2 | 3.0 TWh |
| Christian County, IL | # 14 | 6 | 2.6 TWh |
| Livingston County, IL | # 15 | 12 | 2.4 TWh |
| Shelby County, IL | # 16 | 3 | 2.3 TWh |
| Bureau County, IL | # 17 | 9 | 2.1 TWh |
| Macon County, IL | # 18 | 5 | 2.1 TWh |
| Sangamon County, IL | # 19 | 10 | 2.1 TWh |
| Henry County, IL | # 20 | 6 | 1.6 TWh |
| Logan County, IL | # 21 | 6 | 1.5 TWh |
| Mason County, IL | # 22 | 4 | 1.3 TWh |
| Ford County, IL | # 23 | 3 | 1.2 TWh |
| Vermilion County, IL | # 24 | 9 | 1.2 TWh |
| Iroquois County, IL | # 25 | 3 | 759.3 GWh |
| Williamson County, IL | # 26 | 7 | 748.3 GWh |
| Douglas County, IL | # 27 | 2 | 747.2 GWh |
| DeKalb County, IL | # 28 | 14 | 667.1 GWh |
| Cook County, IL | # 29 | 60 | 617.9 GWh |
| Kankakee County, IL | # 30 | 15 | 617.0 GWh |
| Woodford County, IL | # 31 | 3 | 580.4 GWh |
| McDonough County, IL | # 32 | 5 | 545.3 GWh |
| Madison County, IL | # 33 | 9 | 484.7 GWh |
| Stephenson County, IL | # 34 | 26 | 479.1 GWh |
| DuPage County, IL | # 35 | 13 | 468.8 GWh |
| Coles County, IL | # 36 | 2 | 367.9 GWh |
| White County, IL | # 37 | 3 | 367.7 GWh |
| Stark County, IL | # 38 | 1 | 363.5 GWh |
| County | State Rank | Active Plants | Mar 2025 Generation |
|---|
| Lake County, IL | # 39 | 8 | 345.1 GWh |
| Marshall County, IL | # 40 | 4 | 339.0 GWh |
| Perry County, IL | # 41 | 3 | 311.8 GWh |
| Clark County, IL | # 42 | 3 | 295.8 GWh |
| Champaign County, IL | # 43 | 12 | 281.3 GWh |
| Fayette County, IL | # 44 | 3 | 234.2 GWh |
| Winnebago County, IL | # 45 | 20 | 192.4 GWh |
| Morgan County, IL | # 46 | 8 | 169.5 GWh |
| Clay County, IL | # 47 | 6 | 128.4 GWh |
| Piatt County, IL | # 48 | 2 | 112.5 GWh |
| Kane County, IL | # 49 | 13 | 75.6 GWh |
| Jersey County, IL | # 50 | 1 | 65.1 GWh |
| Saline County, IL | # 51 | 1 | 53.4 GWh |
| Cass County, IL | # 52 | 3 | 51.1 GWh |
| Warren County, IL | # 53 | 1 | 50.2 GWh |
| Pike County, IL | # 54 | 4 | 41.8 GWh |
| Peoria County, IL | # 55 | 7 | 35.3 GWh |
| McHenry County, IL | # 56 | 17 | 33.0 GWh |
| Whiteside County, IL | # 57 | 15 | 32.2 GWh |
| Scott County, IL | # 58 | 1 | 20.1 GWh |
| Montgomery County, IL | # 59 | 2 | 17.3 GWh |
| Macoupin County, IL | # 60 | 2 | 10.5 GWh |
| Clinton County, IL | # 61 | 6 | 9.1 GWh |
| Boone County, IL | # 62 | 3 | 7.9 GWh |
| Jackson County, IL | # 63 | 2 | 7.1 GWh |
| Jo Daviess County, IL | # 64 | 2 | 6.9 GWh |
| Richland County, IL | # 65 | 1 | 4.5 GWh |
| Jefferson County, IL | # 66 | 1 | 3.9 GWh |
| Franklin County, IL | # 67 | 1 | 3.8 GWh |
| Fulton County, IL | # 68 | 2 | 3.6 GWh |
| Marion County, IL | # 69 | 1 | 3.2 GWh |
| Henderson County, IL | # 70 | 1 | 2.8 GWh |
| Brown County, IL | # 71 | 1 | 2.6 GWh |
| Adams County, IL | # 72 | 2 | 2.4 GWh |
| Knox County, IL | # 73 | 4 | 1.6 GWh |
| Monroe County, IL | # 74 | 2 | 462.0 MWh |
| Moultrie County, IL | # 75 | 1 | 206.0 MWh |
| Effingham County, IL | # 76 | 1 | 80.0 MWh |
