| State Rank | County | Net Generation (Past Year) | Power Plants |
|---|
| #39 | Worth County, IA | 651.7 GWh | 7 |
| #20 | Woodbury County, IA | 1.4 TWh | 3 |
| #74 | Winneshiek County, IA | 10.0 MWh | 2 |
| #24 | Winnebago County, IA | 1.1 TWh | 8 |
| #27 | Webster County, IA | 1.0 TWh | 5 |
| #9 | Wapello County, IA | 1.9 TWh | 2 |
| #29 | Union County, IA | 959.4 GWh | 4 |
| #48 | Taylor County, IA | 354.6 GWh | 4 |
| #63 | Tama County, IA | 5.6 GWh | 5 |
| #25 | Story County, IA | 1.1 TWh | 18 |
| #75 | Shelby County, IA | 6.0 MWh | 1 |
| #61 | Scott County, IA | 6.3 GWh | 3 |
| #31 | Sac County, IA | 875.0 GWh | 2 |
| #8 | Poweshiek County, IA | 2.0 TWh | 9 |
| #1 | Pottawattamie County, IA | 6.8 TWh | 2 |
| #7 | Polk County, IA | 2.3 TWh | 9 |
| #21 | Pocahontas County, IA | 1.4 TWh | 4 |
| #34 | Plymouth County, IA | 800.9 GWh | 1 |
| #15 | Palo Alto County, IA | 1.6 TWh | 4 |
| #71 | Page County, IA | 78.0 MWh | 1 |
| #38 | Osceola County, IA | 668.2 GWh | 8 |
| #6 | O'Brien County, IA | 2.5 TWh | 3 |
| #44 | Muscatine County, IA | 569.2 GWh | 6 |
| #73 | Montgomery County, IA | 13.0 MWh | 1 |
| #56 | Monroe County, IA | 76.3 GWh | 1 |
| #12 | Mitchell County, IA | 1.7 TWh | 5 |
| #2 | Marshall County, IA | 4.3 TWh | 7 |
| #54 | Marion County, IA | 137.6 GWh | 5 |
| #42 | Mahaska County, IA | 608.6 GWh | 1 |
| #50 | Madison County, IA | 322.4 GWh | 2 |
| #72 | Lyon County, IA | 13.0 MWh | 1 |
| #4 | Louisa County, IA | 2.9 TWh | 2 |
| #22 | Linn County, IA | 1.2 TWh | 23 |
| #26 | Lee County, IA | 1.1 TWh | 4 |
| #13 | Kossuth County, IA | 1.7 TWh | 9 |
| #59 | Johnson County, IA | 10.8 GWh | 5 |
| #64 | Jackson County, IA | 5.4 GWh | 5 |
| #32 | Iowa County, IA | 868.9 GWh | 3 |
| #11 | Ida County, IA | 1.7 TWh | 2 |
| #43 | Howard County, IA | 574.7 GWh | 3 |
| #65 | Henry County, IA | 4.7 GWh | 3 |
| #47 | Hardin County, IA | 361.7 GWh | 3 |
| #14 | Hancock County, IA | 1.6 TWh | 3 |
| #19 | Hamilton County, IA | 1.4 TWh | 4 |
| #33 | Guthrie County, IA | 846.1 GWh | 3 |
| #35 | Grundy County, IA | 794.0 GWh | 4 |
| #53 | Greene County, IA | 210.0 GWh | 5 |
| #16 | Franklin County, IA | 1.5 TWh | 5 |
| #52 | Floyd County, IA | 259.0 GWh | 3 |
| #66 | Emmet County, IA | 3.0 GWh | 2 |
| #62 | Dubuque County, IA | 5.7 GWh | 6 |
| #46 | Dickinson County, IA | 383.0 GWh | 5 |
| #69 | Des Moines County, IA | 1.0 GWh | 2 |
| #49 | Delaware County, IA | 343.6 GWh | 5 |
| #70 | Decatur County, IA | 135.0 MWh | 1 |
| #68 | Davis County, IA | 2.1 GWh | 2 |
| #51 | Crawford County, IA | 268.1 GWh | 3 |
| #36 | Clinton County, IA | 785.4 GWh | 2 |
| #67 | Clayton County, IA | 2.3 GWh | 4 |
| #23 | Clay County, IA | 1.1 TWh | 3 |
| #40 | Chickasaw County, IA | 647.0 GWh | 2 |
| #30 | Cherokee County, IA | 892.0 GWh | 1 |
| #5 | Cerro Gordo County, IA | 2.7 TWh | 6 |
| #60 | Cedar County, IA | 7.9 GWh | 4 |
| #10 | Cass County, IA | 1.7 TWh | 6 |
| #28 | Carroll County, IA | 994.7 GWh | 5 |
| #37 | Buena Vista County, IA | 751.8 GWh | 5 |
| #55 | Bremer County, IA | 103.9 GWh | 5 |
| #18 | Boone County, IA | 1.4 TWh | 4 |
| #57 | Black Hawk County, IA | 48.6 GWh | 9 |
| #17 | Audubon County, IA | 1.5 TWh | 3 |
| #58 | Appanoose County, IA | 25.8 GWh | 2 |
| #41 | Allamakee County, IA | 631.6 GWh | 2 |
| #45 | Adams County, IA | 522.1 GWh | 4 |
| #3 | Adair County, IA | 4.0 TWh | 18 |
Net Generation data is based on the last 12 months since Jan 2025
