Directory of Power Plants in Iowa
| County | State Rank | Active Plants | May 2026 Generation |
|---|
| Pottawattamie County, IA | # 1 | 2 | 7.4 TWh |
| Louisa County, IA | # 2 | 2 | 4.6 TWh |
| Marshall County, IA | # 3 | 7 | 4.2 TWh |
| Adair County, IA | # 4 | 18 | 4.0 TWh |
| Wapello County, IA | # 5 | 2 | 3.5 TWh |
| Woodbury County, IA | # 6 | 3 | 3.4 TWh |
| Cerro Gordo County, IA | # 7 | 7 | 2.7 TWh |
| Polk County, IA | # 8 | 9 | 2.0 TWh |
| O'Brien County, IA | # 9 | 3 | 1.9 TWh |
| Poweshiek County, IA | # 10 | 10 | 1.9 TWh |
| Ida County, IA | # 11 | 2 | 1.8 TWh |
| Cass County, IA | # 12 | 6 | 1.6 TWh |
| Mitchell County, IA | # 13 | 7 | 1.6 TWh |
| Hancock County, IA | # 14 | 3 | 1.5 TWh |
| Palo Alto County, IA | # 15 | 5 | 1.5 TWh |
| Linn County, IA | # 16 | 24 | 1.5 TWh |
| Kossuth County, IA | # 17 | 9 | 1.5 TWh |
| Audubon County, IA | # 18 | 3 | 1.5 TWh |
| Lee County, IA | # 19 | 4 | 1.4 TWh |
| Franklin County, IA | # 20 | 6 | 1.4 TWh |
| Hamilton County, IA | # 21 | 4 | 1.4 TWh |
| Pocahontas County, IA | # 22 | 4 | 1.3 TWh |
| Boone County, IA | # 23 | 4 | 1.2 TWh |
| Winnebago County, IA | # 24 | 7 | 1.1 TWh |
| Clay County, IA | # 25 | 3 | 1.1 TWh |
| Union County, IA | # 26 | 4 | 1.0 TWh |
| Story County, IA | # 27 | 18 | 1.0 TWh |
| Carroll County, IA | # 28 | 5 | 994.4 GWh |
| Iowa County, IA | # 29 | 3 | 856.1 GWh |
| Guthrie County, IA | # 30 | 3 | 821.7 GWh |
| Cherokee County, IA | # 31 | 1 | 816.9 GWh |
| Sac County, IA | # 32 | 2 | 814.7 GWh |
| Webster County, IA | # 33 | 5 | 811.7 GWh |
| Muscatine County, IA | # 34 | 6 | 768.5 GWh |
| Plymouth County, IA | # 35 | 1 | 767.8 GWh |
| Buena Vista County, IA | # 36 | 5 | 748.0 GWh |
| Clinton County, IA | # 37 | 4 | 679.4 GWh |
| Adams County, IA | # 38 | 4 | 636.3 GWh |
| Chickasaw County, IA | # 39 | 2 | 634.9 GWh |
| County | State Rank | Active Plants | May 2026 Generation |
|---|
| Grundy County, IA | # 40 | 4 | 627.9 GWh |
| Osceola County, IA | # 41 | 8 | 619.8 GWh |
| Worth County, IA | # 42 | 7 | 617.4 GWh |
| Mahaska County, IA | # 43 | 1 | 611.0 GWh |
| Howard County, IA | # 44 | 3 | 543.8 GWh |
| Delaware County, IA | # 45 | 5 | 406.1 GWh |
| Dickinson County, IA | # 46 | 5 | 403.0 GWh |
| Tama County, IA | # 47 | 6 | 365.7 GWh |
| Taylor County, IA | # 48 | 4 | 353.6 GWh |
| Hardin County, IA | # 49 | 3 | 351.5 GWh |
| Page County, IA | # 50 | 2 | 336.1 GWh |
| Floyd County, IA | # 51 | 3 | 270.3 GWh |
| Crawford County, IA | # 52 | 3 | 263.0 GWh |
| Madison County, IA | # 53 | 2 | 248.7 GWh |
| Greene County, IA | # 54 | 5 | 222.7 GWh |
| Marion County, IA | # 55 | 5 | 213.9 GWh |
| Bremer County, IA | # 56 | 5 | 174.4 GWh |
| Monroe County, IA | # 57 | 1 | 112.1 GWh |
| Black Hawk County, IA | # 58 | 9 | 58.3 GWh |
| Des Moines County, IA | # 59 | 2 | 26.5 GWh |
| Appanoose County, IA | # 60 | 2 | 26.0 GWh |
| Johnson County, IA | # 61 | 5 | 8.3 GWh |
| Dubuque County, IA | # 62 | 6 | 6.5 GWh |
| Scott County, IA | # 63 | 3 | 6.4 GWh |
| Jackson County, IA | # 64 | 5 | 5.8 GWh |
| Henry County, IA | # 65 | 3 | 5.8 GWh |
| Winneshiek County, IA | # 66 | 3 | 4.6 GWh |
| Lucas County, IA | # 67 | 1 | 4.3 GWh |
| Clayton County, IA | # 68 | 4 | 2.2 GWh |
| Davis County, IA | # 69 | 2 | 2.0 GWh |
| Dallas County, IA | # 70 | 1 | 1.9 GWh |
| Emmet County, IA | # 71 | 2 | 573.0 MWh |
| Cedar County, IA | # 72 | 4 | 295.4 MWh |
| Allamakee County, IA | # 73 | 3 | 45.1 MWh |
| Decatur County, IA | # 74 | 1 | 45.0 MWh |
| Montgomery County, IA | # 75 | 1 | 22.0 MWh |
| Lyon County, IA | # 76 | 1 | 20.0 MWh |
| Shelby County, IA | # 77 | 1 | 1.0 MWh |
