| State Rank | County | Net Generation (Past Year) | Power Plants |
|---|
| #33 | Cuyahoga County, OH | 387.0 GWh | 16 |
| #13 | Butler County, OH | 5.4 TWh | 12 |
| #67 | Franklin County, OH | 923.0 MWh | 12 |
| #11 | Lucas County, OH | 6.8 TWh | 11 |
| #21 | Wood County, OH | 1.3 TWh | 10 |
| #19 | Paulding County, OH | 1.5 TWh | 10 |
| #48 | Hancock County, OH | 40.6 GWh | 8 |
| #46 | Williams County, OH | 51.8 GWh | 8 |
| #61 | Richland County, OH | 3.4 GWh | 8 |
| #3 | Washington County, OH | 11.6 TWh | 8 |
| #26 | Montgomery County, OH | 1.0 TWh | 8 |
| #8 | Trumbull County, OH | 7.6 TWh | 8 |
| #51 | Auglaize County, OH | 32.0 GWh | 7 |
| #56 | Henry County, OH | 17.9 GWh | 7 |
| #22 | Lorain County, OH | 1.3 TWh | 7 |
| #41 | Darke County, OH | 114.3 GWh | 6 |
| #27 | Pickaway County, OH | 917.0 GWh | 6 |
| #6 | Jefferson County, OH | 9.6 TWh | 6 |
| #47 | Wayne County, OH | 47.1 GWh | 6 |
| #10 | Hamilton County, OH | 6.8 TWh | 6 |
| #58 | Medina County, OH | 15.2 GWh | 6 |
| #18 | Madison County, OH | 2.0 TWh | 5 |
| #23 | Highland County, OH | 1.3 TWh | 5 |
| #24 | Ross County, OH | 1.2 TWh | 5 |
| #20 | Hardin County, OH | 1.4 TWh | 5 |
| #14 | Sandusky County, OH | 4.3 TWh | 5 |
| #59 | Summit County, OH | 11.1 GWh | 5 |
| #25 | Van Wert County, OH | 1.2 TWh | 5 |
| #31 | Putnam County, OH | 428.2 GWh | 4 |
| #43 | Crawford County, OH | 92.2 GWh | 4 |
| #42 | Marion County, OH | 102.2 GWh | 4 |
| #57 | Wyandot County, OH | 15.5 GWh | 3 |
| #62 | Shelby County, OH | 2.9 GWh | 3 |
| #65 | Stark County, OH | 2.1 GWh | 3 |
| #9 | Ottawa County, OH | 7.1 TWh | 3 |
| #28 | Union County, OH | 879.9 GWh | 3 |
| #39 | Ashtabula County, OH | 176.0 GWh | 3 |
| #54 | Miami County, OH | 23.0 GWh | 3 |
| #38 | Fulton County, OH | 203.6 GWh | 3 |
| #53 | Mahoning County, OH | 27.4 GWh | 3 |
| #34 | Defiance County, OH | 373.6 GWh | 3 |
| #30 | Logan County, OH | 475.9 GWh | 3 |
| #63 | Licking County, OH | 2.8 GWh | 3 |
| #40 | Clermont County, OH | 162.6 GWh | 3 |
| #66 | Greene County, OH | 2.1 GWh | 3 |
| #4 | Lake County, OH | 10.9 TWh | 3 |
| #64 | Huron County, OH | 2.6 GWh | 3 |
| #44 | Clinton County, OH | 60.1 GWh | 3 |
| #50 | Warren County, OH | 32.2 GWh | 2 |
| #37 | Erie County, OH | 215.3 GWh | 2 |
| #45 | Tuscarawas County, OH | 55.6 GWh | 2 |
| #36 | Meigs County, OH | 242.0 GWh | 2 |
| #68 | Clark County, OH | 277.0 MWh | 2 |
| #35 | Champaign County, OH | 291.5 GWh | 2 |
| #12 | Carroll County, OH | 5.5 TWh | 2 |
| #32 | Brown County, OH | 392.4 GWh | 2 |
| #1 | Gallia County, OH | 17.9 TWh | 2 |
| #29 | Scioto County, OH | 585.8 GWh | 2 |
| #15 | Muskingum County, OH | 3.7 TWh | 2 |
| #16 | Monroe County, OH | 3.5 TWh | 2 |
| #55 | Seneca County, OH | 18.5 GWh | 1 |
| #7 | Columbiana County, OH | 7.9 TWh | 1 |
| #2 | Guernsey County, OH | 12.1 TWh | 1 |
| #17 | Vinton County, OH | 2.0 TWh | 1 |
| #52 | Portage County, OH | 29.4 GWh | 1 |
| #5 | Lawrence County, OH | 9.9 TWh | 1 |
| #49 | Perry County, OH | 32.9 GWh | 1 |
| #60 | Mercer County, OH | 6.5 GWh | 1 |
Net Generation data is based on the last 12 months since Dec 2025
