Directory of Power Plants in Ohio
| County | State Rank | Active Plants | May 2025 Generation |
|---|
| Gallia County, OH | # 1 | 2 | 17.3 TWh |
| Guernsey County, OH | # 2 | 1 | 11.5 TWh |
| Washington County, OH | # 3 | 8 | 10.8 TWh |
| Jefferson County, OH | # 4 | 5 | 9.9 TWh |
| Lake County, OH | # 5 | 3 | 9.3 TWh |
| Lawrence County, OH | # 6 | 1 | 8.8 TWh |
| Columbiana County, OH | # 7 | 1 | 8.1 TWh |
| Ottawa County, OH | # 8 | 3 | 8.0 TWh |
| Lucas County, OH | # 9 | 11 | 6.9 TWh |
| Hamilton County, OH | # 10 | 6 | 6.7 TWh |
| Trumbull County, OH | # 11 | 8 | 6.4 TWh |
| Carroll County, OH | # 12 | 2 | 5.3 TWh |
| Butler County, OH | # 13 | 11 | 4.9 TWh |
| Sandusky County, OH | # 14 | 5 | 4.2 TWh |
| Muskingum County, OH | # 15 | 2 | 4.2 TWh |
| Monroe County, OH | # 16 | 2 | 3.9 TWh |
| Vinton County, OH | # 17 | 1 | 2.2 TWh |
| Madison County, OH | # 18 | 5 | 1.7 TWh |
| Lorain County, OH | # 19 | 7 | 1.7 TWh |
| Paulding County, OH | # 20 | 10 | 1.4 TWh |
| Montgomery County, OH | # 21 | 7 | 1.4 TWh |
| Van Wert County, OH | # 22 | 5 | 1.1 TWh |
| Wood County, OH | # 23 | 9 | 1.0 TWh |
| Ross County, OH | # 24 | 5 | 967.8 GWh |
| Highland County, OH | # 25 | 4 | 844.6 GWh |
| Hardin County, OH | # 26 | 5 | 773.3 GWh |
| Pickaway County, OH | # 27 | 4 | 650.9 GWh |
| Scioto County, OH | # 28 | 2 | 614.9 GWh |
| Logan County, OH | # 29 | 3 | 562.5 GWh |
| Brown County, OH | # 30 | 2 | 403.3 GWh |
| Cuyahoga County, OH | # 31 | 14 | 353.1 GWh |
| Defiance County, OH | # 32 | 3 | 333.8 GWh |
| Union County, OH | # 33 | 3 | 286.7 GWh |
| County | State Rank | Active Plants | May 2025 Generation |
|---|
| Fulton County, OH | # 34 | 3 | 194.7 GWh |
| Ashtabula County, OH | # 35 | 3 | 185.9 GWh |
| Meigs County, OH | # 36 | 2 | 174.8 GWh |
| Putnam County, OH | # 37 | 4 | 144.1 GWh |
| Clermont County, OH | # 38 | 3 | 136.0 GWh |
| Darke County, OH | # 39 | 6 | 114.4 GWh |
| Champaign County, OH | # 40 | 2 | 108.6 GWh |
| Hancock County, OH | # 41 | 7 | 43.3 GWh |
| Wayne County, OH | # 42 | 6 | 38.8 GWh |
| Auglaize County, OH | # 43 | 7 | 33.9 GWh |
| Portage County, OH | # 44 | 1 | 33.9 GWh |
| Marion County, OH | # 45 | 4 | 32.7 GWh |
| Perry County, OH | # 46 | 1 | 28.2 GWh |
| Miami County, OH | # 47 | 3 | 27.0 GWh |
| Mahoning County, OH | # 48 | 3 | 26.8 GWh |
| Seneca County, OH | # 49 | 1 | 19.8 GWh |
| Henry County, OH | # 50 | 7 | 18.5 GWh |
| Wyandot County, OH | # 51 | 3 | 16.0 GWh |
| Medina County, OH | # 52 | 6 | 15.6 GWh |
| Summit County, OH | # 53 | 5 | 13.7 GWh |
| Erie County, OH | # 54 | 2 | 10.5 GWh |
| Williams County, OH | # 55 | 8 | 6.6 GWh |
| Mercer County, OH | # 56 | 1 | 6.5 GWh |
| Richland County, OH | # 57 | 7 | 4.4 GWh |
| Huron County, OH | # 58 | 3 | 3.8 GWh |
| Crawford County, OH | # 59 | 3 | 3.1 GWh |
| Shelby County, OH | # 60 | 3 | 3.0 GWh |
| Stark County, OH | # 61 | 3 | 2.3 GWh |
| Licking County, OH | # 62 | 2 | 2.1 GWh |
| Greene County, OH | # 63 | 3 | 2.1 GWh |
| Clark County, OH | # 64 | 2 | 1.1 GWh |
| Franklin County, OH | # 65 | 11 | 555.0 MWh |
| Tuscarawas County, OH | # 66 | 2 | 402.0 MWh |
