| State Rank | County | Net Generation (Past Year) | Power Plants |
|---|
| #37 | Ashtabula County, OH | 183.3 GWh | 3 |
| #45 | Auglaize County, OH | 33.9 GWh | 7 |
| #31 | Brown County, OH | 390.3 GWh | 2 |
| #13 | Butler County, OH | 4.9 TWh | 11 |
| #12 | Carroll County, OH | 5.3 TWh | 2 |
| #35 | Champaign County, OH | 282.3 GWh | 2 |
| #67 | Clark County, OH | 277.0 MWh | 2 |
| #39 | Clermont County, OH | 156.8 GWh | 3 |
| #58 | Clinton County, OH | 4.5 GWh | 2 |
| #8 | Columbiana County, OH | 7.2 TWh | 1 |
| #61 | Crawford County, OH | 3.1 GWh | 3 |
| #32 | Cuyahoga County, OH | 372.2 GWh | 14 |
| #40 | Darke County, OH | 114.4 GWh | 6 |
| #33 | Defiance County, OH | 333.8 GWh | 3 |
| #41 | Erie County, OH | 96.5 GWh | 2 |
| #66 | Franklin County, OH | 549.0 MWh | 11 |
| #36 | Fulton County, OH | 200.0 GWh | 3 |
| #1 | Gallia County, OH | 18.3 TWh | 2 |
| #64 | Greene County, OH | 2.2 GWh | 3 |
| #2 | Guernsey County, OH | 11.3 TWh | 1 |
| #9 | Hamilton County, OH | 6.9 TWh | 6 |
| #43 | Hancock County, OH | 43.3 GWh | 8 |
| #22 | Hardin County, OH | 1.3 TWh | 5 |
| #52 | Henry County, OH | 18.5 GWh | 7 |
| #25 | Highland County, OH | 1.1 TWh | 5 |
| #59 | Huron County, OH | 3.8 GWh | 3 |
| #3 | Jefferson County, OH | 10.8 TWh | 5 |
| #5 | Lake County, OH | 9.4 TWh | 3 |
| #4 | Lawrence County, OH | 10.2 TWh | 1 |
| #65 | Licking County, OH | 2.0 GWh | 2 |
| #30 | Logan County, OH | 532.8 GWh | 3 |
| #19 | Lorain County, OH | 1.7 TWh | 7 |
| #10 | Lucas County, OH | 6.6 TWh | 11 |
| #18 | Madison County, OH | 1.9 TWh | 5 |
| #50 | Mahoning County, OH | 26.8 GWh | 3 |
| #46 | Marion County, OH | 32.7 GWh | 4 |
| #53 | Medina County, OH | 15.6 GWh | 6 |
| #38 | Meigs County, OH | 177.4 GWh | 2 |
| #57 | Mercer County, OH | 6.5 GWh | 1 |
| #49 | Miami County, OH | 27.0 GWh | 3 |
| #16 | Monroe County, OH | 3.8 TWh | 2 |
| #21 | Montgomery County, OH | 1.4 TWh | 7 |
| #14 | Muskingum County, OH | 4.2 TWh | 2 |
| #7 | Ottawa County, OH | 7.8 TWh | 3 |
| #20 | Paulding County, OH | 1.5 TWh | 10 |
| #48 | Perry County, OH | 28.2 GWh | 1 |
| #27 | Pickaway County, OH | 884.3 GWh | 6 |
| #47 | Portage County, OH | 29.3 GWh | 1 |
| #34 | Putnam County, OH | 327.3 GWh | 4 |
| #60 | Richland County, OH | 3.7 GWh | 7 |
| #23 | Ross County, OH | 1.2 TWh | 5 |
| #15 | Sandusky County, OH | 4.0 TWh | 5 |
| #29 | Scioto County, OH | 586.9 GWh | 2 |
| #51 | Seneca County, OH | 19.8 GWh | 1 |
| #62 | Shelby County, OH | 3.0 GWh | 3 |
| #63 | Stark County, OH | 2.3 GWh | 3 |
| #55 | Summit County, OH | 11.5 GWh | 5 |
| #11 | Trumbull County, OH | 6.6 TWh | 8 |
| #42 | Tuscarawas County, OH | 52.1 GWh | 2 |
| #28 | Union County, OH | 657.8 GWh | 3 |
| #24 | Van Wert County, OH | 1.1 TWh | 5 |
| #17 | Vinton County, OH | 2.2 TWh | 1 |
| #6 | Washington County, OH | 8.7 TWh | 8 |
| #44 | Wayne County, OH | 38.8 GWh | 6 |
| #56 | Williams County, OH | 6.6 GWh | 8 |
| #26 | Wood County, OH | 1.0 TWh | 10 |
| #54 | Wyandot County, OH | 15.5 GWh | 3 |
Net Generation data is based on the last 12 months since Dec 2025
