Directory of Power Plants in Iowa
| County | State Rank | Active Plants | Sep 2025 Generation |
|---|
| Pottawattamie County, IA | # 1 | 2 | 6.4 TWh |
| Louisa County, IA | # 2 | 2 | 4.4 TWh |
| Marshall County, IA | # 3 | 7 | 4.3 TWh |
| Adair County, IA | # 4 | 18 | 4.0 TWh |
| Woodbury County, IA | # 5 | 3 | 3.1 TWh |
| Wapello County, IA | # 6 | 2 | 2.9 TWh |
| Cerro Gordo County, IA | # 7 | 6 | 2.7 TWh |
| O'Brien County, IA | # 8 | 3 | 2.5 TWh |
| Polk County, IA | # 9 | 9 | 2.3 TWh |
| Poweshiek County, IA | # 10 | 10 | 1.9 TWh |
| Ida County, IA | # 11 | 2 | 1.8 TWh |
| Mitchell County, IA | # 12 | 5 | 1.6 TWh |
| Cass County, IA | # 13 | 6 | 1.6 TWh |
| Hancock County, IA | # 14 | 3 | 1.5 TWh |
| Audubon County, IA | # 15 | 3 | 1.5 TWh |
| Kossuth County, IA | # 16 | 9 | 1.5 TWh |
| Palo Alto County, IA | # 17 | 5 | 1.5 TWh |
| Linn County, IA | # 18 | 24 | 1.4 TWh |
| Hamilton County, IA | # 19 | 4 | 1.4 TWh |
| Franklin County, IA | # 20 | 6 | 1.4 TWh |
| Pocahontas County, IA | # 21 | 4 | 1.4 TWh |
| Lee County, IA | # 22 | 4 | 1.3 TWh |
| Boone County, IA | # 23 | 4 | 1.3 TWh |
| Clay County, IA | # 24 | 3 | 1.1 TWh |
| Webster County, IA | # 25 | 5 | 1.0 TWh |
| Winnebago County, IA | # 26 | 7 | 1.0 TWh |
| Carroll County, IA | # 27 | 5 | 995.0 GWh |
| Union County, IA | # 28 | 4 | 993.9 GWh |
| Story County, IA | # 29 | 18 | 991.3 GWh |
| Iowa County, IA | # 30 | 3 | 837.1 GWh |
| Cherokee County, IA | # 31 | 1 | 831.7 GWh |
| Guthrie County, IA | # 32 | 3 | 825.8 GWh |
| Sac County, IA | # 33 | 2 | 806.9 GWh |
| Grundy County, IA | # 34 | 4 | 798.2 GWh |
| Plymouth County, IA | # 35 | 1 | 778.2 GWh |
| Buena Vista County, IA | # 36 | 5 | 748.4 GWh |
| Clinton County, IA | # 37 | 3 | 727.4 GWh |
| Muscatine County, IA | # 38 | 6 | 726.6 GWh |
| Chickasaw County, IA | # 39 | 2 | 660.9 GWh |
| County | State Rank | Active Plants | Sep 2025 Generation |
|---|
| Worth County, IA | # 40 | 7 | 633.8 GWh |
| Adams County, IA | # 41 | 4 | 632.6 GWh |
| Osceola County, IA | # 42 | 8 | 627.2 GWh |
| Mahaska County, IA | # 43 | 1 | 586.5 GWh |
| Howard County, IA | # 44 | 3 | 574.4 GWh |
| Delaware County, IA | # 45 | 5 | 420.2 GWh |
| Dickinson County, IA | # 46 | 5 | 361.0 GWh |
| Hardin County, IA | # 47 | 3 | 355.4 GWh |
| Madison County, IA | # 48 | 2 | 330.0 GWh |
| Taylor County, IA | # 49 | 4 | 323.2 GWh |
| Crawford County, IA | # 50 | 3 | 287.5 GWh |
| Floyd County, IA | # 51 | 3 | 274.6 GWh |
| Greene County, IA | # 52 | 5 | 212.2 GWh |
| Bremer County, IA | # 53 | 5 | 180.2 GWh |
| Marion County, IA | # 54 | 5 | 164.8 GWh |
| Monroe County, IA | # 55 | 1 | 110.5 GWh |
| Black Hawk County, IA | # 56 | 9 | 48.3 GWh |
| Appanoose County, IA | # 57 | 2 | 26.6 GWh |
| Des Moines County, IA | # 58 | 2 | 14.1 GWh |
| Johnson County, IA | # 59 | 5 | 10.2 GWh |
| Dubuque County, IA | # 60 | 6 | 6.7 GWh |
| Cedar County, IA | # 61 | 4 | 6.0 GWh |
| Scott County, IA | # 62 | 3 | 5.7 GWh |
| Winneshiek County, IA | # 63 | 3 | 5.6 GWh |
| Tama County, IA | # 64 | 5 | 5.6 GWh |
| Jackson County, IA | # 65 | 5 | 5.3 GWh |
| Henry County, IA | # 66 | 3 | 4.3 GWh |
| Clayton County, IA | # 67 | 4 | 2.2 GWh |
| Davis County, IA | # 68 | 2 | 2.0 GWh |
| Emmet County, IA | # 69 | 2 | 1.9 GWh |
| Lucas County, IA | # 70 | 1 | 1.5 GWh |
| Dallas County, IA | # 71 | 1 | 739.0 MWh |
| Warren County, IA | # 72 | 1 | 446.0 MWh |
| Decatur County, IA | # 73 | 1 | 86.0 MWh |
| Page County, IA | # 74 | 2 | 44.0 MWh |
| Allamakee County, IA | # 75 | 2 | 40.2 MWh |
| Lyon County, IA | # 76 | 1 | 13.0 MWh |
| Montgomery County, IA | # 77 | 1 | 7.0 MWh |
| Shelby County, IA | # 78 | 1 | 2.0 MWh |
