| State Rank | County | Net Generation (Past Year) | Power Plants |
|---|
| #22 | Linn County, IA | 1.3 TWh | 23 |
| #3 | Adair County, IA | 4.1 TWh | 18 |
| #27 | Story County, IA | 1.0 TWh | 18 |
| #9 | Poweshiek County, IA | 1.9 TWh | 10 |
| #56 | Black Hawk County, IA | 47.5 GWh | 9 |
| #7 | Polk County, IA | 2.3 TWh | 9 |
| #14 | Kossuth County, IA | 1.6 TWh | 9 |
| #40 | Osceola County, IA | 653.2 GWh | 8 |
| #41 | Worth County, IA | 634.2 GWh | 7 |
| #25 | Winnebago County, IA | 1.1 TWh | 7 |
| #2 | Marshall County, IA | 4.3 TWh | 7 |
| #59 | Dubuque County, IA | 6.7 GWh | 6 |
| #18 | Franklin County, IA | 1.4 TWh | 6 |
| #38 | Muscatine County, IA | 700.5 GWh | 6 |
| #5 | Cerro Gordo County, IA | 2.7 TWh | 6 |
| #12 | Cass County, IA | 1.7 TWh | 6 |
| #13 | Mitchell County, IA | 1.7 TWh | 5 |
| #54 | Marion County, IA | 144.6 GWh | 5 |
| #17 | Palo Alto County, IA | 1.6 TWh | 5 |
| #58 | Johnson County, IA | 10.2 GWh | 5 |
| #63 | Tama County, IA | 5.6 GWh | 5 |
| #52 | Greene County, IA | 212.2 GWh | 5 |
| #26 | Webster County, IA | 1.0 TWh | 5 |
| #64 | Jackson County, IA | 4.8 GWh | 5 |
| #37 | Buena Vista County, IA | 748.4 GWh | 5 |
| #45 | Delaware County, IA | 426.8 GWh | 5 |
| #28 | Carroll County, IA | 995.0 GWh | 5 |
| #53 | Bremer County, IA | 180.2 GWh | 5 |
| #46 | Dickinson County, IA | 361.0 GWh | 5 |
| #42 | Adams County, IA | 612.0 GWh | 4 |
| #20 | Pocahontas County, IA | 1.4 TWh | 4 |
| #60 | Cedar County, IA | 6.0 GWh | 4 |
| #67 | Clayton County, IA | 2.2 GWh | 4 |
| #21 | Boone County, IA | 1.4 TWh | 4 |
| #48 | Taylor County, IA | 334.3 GWh | 4 |
| #29 | Union County, IA | 989.5 GWh | 4 |
| #23 | Lee County, IA | 1.2 TWh | 4 |
| #34 | Grundy County, IA | 808.9 GWh | 4 |
| #19 | Hamilton County, IA | 1.4 TWh | 4 |
| #16 | Audubon County, IA | 1.6 TWh | 3 |
| #6 | O'Brien County, IA | 2.5 TWh | 3 |
| #32 | Guthrie County, IA | 849.0 GWh | 3 |
| #61 | Scott County, IA | 5.7 GWh | 3 |
| #24 | Clay County, IA | 1.1 TWh | 3 |
| #15 | Hancock County, IA | 1.6 TWh | 3 |
| #47 | Hardin County, IA | 361.0 GWh | 3 |
| #65 | Henry County, IA | 4.3 GWh | 3 |
| #44 | Howard County, IA | 584.1 GWh | 3 |
| #8 | Woodbury County, IA | 2.0 TWh | 3 |
| #36 | Clinton County, IA | 791.9 GWh | 3 |
| #62 | Winneshiek County, IA | 5.6 GWh | 3 |
| #50 | Crawford County, IA | 287.5 GWh | 3 |
| #51 | Floyd County, IA | 274.6 GWh | 3 |
| #30 | Iowa County, IA | 864.4 GWh | 3 |
| #39 | Chickasaw County, IA | 684.2 GWh | 2 |
| #1 | Pottawattamie County, IA | 7.3 TWh | 2 |
| #33 | Sac County, IA | 839.9 GWh | 2 |
| #11 | Wapello County, IA | 1.8 TWh | 2 |
| #57 | Appanoose County, IA | 26.6 GWh | 2 |
| #74 | Allamakee County, IA | 38.2 MWh | 2 |
| #73 | Page County, IA | 44.0 MWh | 2 |
| #66 | Emmet County, IA | 2.2 GWh | 2 |
| #10 | Ida County, IA | 1.8 TWh | 2 |
| #68 | Davis County, IA | 2.1 GWh | 2 |
| #4 | Louisa County, IA | 3.7 TWh | 2 |
| #49 | Madison County, IA | 330.0 GWh | 2 |
| #43 | Mahaska County, IA | 601.9 GWh | 1 |
| #77 | Shelby County, IA | 2.0 MWh | 1 |
| #75 | Lyon County, IA | 13.0 MWh | 1 |
| #69 | Lucas County, IA | 1.5 GWh | 1 |
| #55 | Monroe County, IA | 110.5 GWh | 1 |
| #71 | Warren County, IA | 446.0 MWh | 1 |
| #70 | Dallas County, IA | 739.0 MWh | 1 |
| #76 | Montgomery County, IA | 7.0 MWh | 1 |
| #31 | Cherokee County, IA | 857.7 GWh | 1 |
| #72 | Decatur County, IA | 86.0 MWh | 1 |
| #35 | Plymouth County, IA | 801.0 GWh | 1 |
Net Generation data is based on the last 12 months since May 2025
