| State Rank | County | Net Generation (Past Year) | Power Plants |
|---|
| #1 | Gallia County, OH | 17.6 TWh | 2 |
| #2 | Jefferson County, OH | 13.1 TWh | 5 |
| #3 | Washington County, OH | 11.7 TWh | 7 |
| #4 | Guernsey County, OH | 11.5 TWh | 1 |
| #5 | Lake County, OH | 10.7 TWh | 3 |
| #6 | Lawrence County, OH | 9.6 TWh | 1 |
| #7 | Columbiana County, OH | 8.5 TWh | 1 |
| #8 | Lucas County, OH | 7.5 TWh | 9 |
| #9 | Ottawa County, OH | 7.4 TWh | 3 |
| #10 | Trumbull County, OH | 6.6 TWh | 8 |
| #11 | Carroll County, OH | 5.3 TWh | 1 |
| #12 | Hamilton County, OH | 5.1 TWh | 6 |
| #13 | Butler County, OH | 5.0 TWh | 11 |
| #14 | Muskingum County, OH | 4.4 TWh | 2 |
| #15 | Sandusky County, OH | 3.6 TWh | 5 |
| #16 | Monroe County, OH | 3.6 TWh | 2 |
| #17 | Vinton County, OH | 2.3 TWh | 1 |
| #18 | Paulding County, OH | 1.4 TWh | 10 |
| #19 | Montgomery County, OH | 1.3 TWh | 7 |
| #20 | Lorain County, OH | 1.2 TWh | 7 |
| #21 | Madison County, OH | 1.1 TWh | 5 |
| #22 | Van Wert County, OH | 930.9 GWh | 5 |
| #23 | Wood County, OH | 872.7 GWh | 9 |
| #24 | Ross County, OH | 799.3 GWh | 5 |
| #25 | Scioto County, OH | 615.7 GWh | 2 |
| #26 | Pickaway County, OH | 557.3 GWh | 4 |
| #27 | Logan County, OH | 523.5 GWh | 3 |
| #28 | Hardin County, OH | 487.8 GWh | 4 |
| #29 | Brown County, OH | 406.9 GWh | 2 |
| #30 | Highland County, OH | 270.0 GWh | 4 |
| #31 | Defiance County, OH | 238.2 GWh | 3 |
| #32 | Cuyahoga County, OH | 218.7 GWh | 14 |
| #33 | Meigs County, OH | 215.3 GWh | 2 |
| #34 | Ashtabula County, OH | 182.3 GWh | 3 |
| #35 | Fulton County, OH | 151.0 GWh | 2 |
| #36 | Putnam County, OH | 119.5 GWh | 4 |
| #37 | Clermont County, OH | 113.6 GWh | 3 |
| #38 | Darke County, OH | 81.5 GWh | 6 |
| #39 | Tuscarawas County, OH | 78.2 GWh | 2 |
| #40 | Hancock County, OH | 56.0 GWh | 5 |
| #41 | Marion County, OH | 42.6 GWh | 5 |
| #42 | Wayne County, OH | 38.2 GWh | 6 |
| #43 | Auglaize County, OH | 31.3 GWh | 7 |
| #44 | Portage County, OH | 30.5 GWh | 1 |
| #45 | Perry County, OH | 30.5 GWh | 1 |
| #46 | Mahoning County, OH | 28.9 GWh | 2 |
| #47 | Miami County, OH | 24.0 GWh | 3 |
| #48 | Seneca County, OH | 21.5 GWh | 1 |
| #49 | Henry County, OH | 16.1 GWh | 6 |
| #50 | Medina County, OH | 15.7 GWh | 6 |
| #51 | Wyandot County, OH | 13.3 GWh | 3 |
| #52 | Erie County, OH | 11.1 GWh | 1 |
| #53 | Summit County, OH | 10.8 GWh | 5 |
| #54 | Mercer County, OH | 6.5 GWh | 1 |
| #55 | Richland County, OH | 5.7 GWh | 7 |
| #56 | Huron County, OH | 4.1 GWh | 2 |
| #57 | Williams County, OH | 4.1 GWh | 7 |
| #58 | Shelby County, OH | 2.8 GWh | 3 |
| #59 | Licking County, OH | 2.3 GWh | 2 |
| #60 | Stark County, OH | 2.2 GWh | 3 |
| #61 | Crawford County, OH | 2.1 GWh | 3 |
| #62 | Greene County, OH | 2.1 GWh | 3 |
| #63 | Clark County, OH | 1.1 GWh | 2 |
| #64 | Franklin County, OH | 10.9 MWh | 9 |
Net Generation data is based on the last 12 months since Dec 2023
