| State Rank | County | Net Generation (Past Year) | Power Plants |
|---|
| #40 | Worth County, IA | 633.8 GWh | 7 |
| #5 | Woodbury County, IA | 3.6 TWh | 3 |
| #64 | Winneshiek County, IA | 5.6 GWh | 3 |
| #25 | Winnebago County, IA | 1.1 TWh | 7 |
| #26 | Webster County, IA | 1.0 TWh | 5 |
| #72 | Warren County, IA | 446.0 MWh | 1 |
| #6 | Wapello County, IA | 3.0 TWh | 2 |
| #29 | Union County, IA | 960.4 GWh | 4 |
| #48 | Taylor County, IA | 340.6 GWh | 4 |
| #52 | Tama County, IA | 234.1 GWh | 6 |
| #28 | Story County, IA | 992.6 GWh | 18 |
| #77 | Shelby County, IA | 2.0 MWh | 1 |
| #63 | Scott County, IA | 5.7 GWh | 3 |
| #33 | Sac County, IA | 796.6 GWh | 2 |
| #10 | Poweshiek County, IA | 1.8 TWh | 10 |
| #1 | Pottawattamie County, IA | 7.0 TWh | 2 |
| #8 | Polk County, IA | 2.3 TWh | 9 |
| #20 | Pocahontas County, IA | 1.3 TWh | 4 |
| #36 | Plymouth County, IA | 768.9 GWh | 1 |
| #16 | Palo Alto County, IA | 1.5 TWh | 5 |
| #55 | Page County, IA | 196.9 GWh | 2 |
| #41 | Osceola County, IA | 619.6 GWh | 8 |
| #9 | O'Brien County, IA | 2.1 TWh | 3 |
| #35 | Muscatine County, IA | 782.8 GWh | 6 |
| #76 | Montgomery County, IA | 7.0 MWh | 1 |
| #57 | Monroe County, IA | 110.5 GWh | 1 |
| #13 | Mitchell County, IA | 1.5 TWh | 5 |
| #3 | Marshall County, IA | 4.0 TWh | 7 |
| #54 | Marion County, IA | 207.4 GWh | 5 |
| #43 | Mahaska County, IA | 586.4 GWh | 1 |
| #49 | Madison County, IA | 330.0 GWh | 2 |
| #69 | Lucas County, IA | 1.5 GWh | 1 |
| #2 | Louisa County, IA | 4.8 TWh | 2 |
| #17 | Linn County, IA | 1.4 TWh | 24 |
| #19 | Lee County, IA | 1.4 TWh | 4 |
| #18 | Kossuth County, IA | 1.4 TWh | 9 |
| #62 | Johnson County, IA | 6.5 GWh | 5 |
| #65 | Jackson County, IA | 5.3 GWh | 5 |
| #30 | Iowa County, IA | 839.1 GWh | 3 |
| #11 | Ida County, IA | 1.8 TWh | 2 |
| #44 | Howard County, IA | 557.9 GWh | 3 |
| #66 | Henry County, IA | 4.3 GWh | 3 |
| #47 | Hardin County, IA | 346.9 GWh | 3 |
| #14 | Hancock County, IA | 1.5 TWh | 3 |
| #22 | Hamilton County, IA | 1.3 TWh | 4 |
| #31 | Guthrie County, IA | 807.5 GWh | 3 |
| #34 | Grundy County, IA | 785.3 GWh | 4 |
| #53 | Greene County, IA | 212.2 GWh | 5 |
| #21 | Franklin County, IA | 1.3 TWh | 6 |
| #51 | Floyd County, IA | 274.6 GWh | 3 |
| #70 | Emmet County, IA | 876.0 MWh | 2 |
| #61 | Dubuque County, IA | 6.7 GWh | 6 |
| #46 | Dickinson County, IA | 361.0 GWh | 5 |
| #60 | Des Moines County, IA | 22.2 GWh | 2 |
| #45 | Delaware County, IA | 412.7 GWh | 5 |
| #73 | Decatur County, IA | 86.0 MWh | 1 |
| #68 | Davis County, IA | 2.0 GWh | 2 |
| #71 | Dallas County, IA | 739.0 MWh | 1 |
| #50 | Crawford County, IA | 287.5 GWh | 3 |
| #38 | Clinton County, IA | 700.9 GWh | 3 |
| #67 | Clayton County, IA | 2.2 GWh | 4 |
| #24 | Clay County, IA | 1.1 TWh | 3 |
| #42 | Chickasaw County, IA | 619.6 GWh | 2 |
| #32 | Cherokee County, IA | 803.5 GWh | 1 |
| #7 | Cerro Gordo County, IA | 2.9 TWh | 6 |
| #74 | Cedar County, IA | 78.8 MWh | 4 |
| #12 | Cass County, IA | 1.6 TWh | 6 |
| #27 | Carroll County, IA | 995.0 GWh | 5 |
| #37 | Buena Vista County, IA | 748.4 GWh | 5 |
| #56 | Bremer County, IA | 180.2 GWh | 5 |
| #23 | Boone County, IA | 1.2 TWh | 4 |
| #58 | Black Hawk County, IA | 48.5 GWh | 9 |
| #15 | Audubon County, IA | 1.5 TWh | 3 |
| #59 | Appanoose County, IA | 26.6 GWh | 2 |
| #75 | Allamakee County, IA | 36.3 MWh | 2 |
| #39 | Adams County, IA | 637.1 GWh | 4 |
| #4 | Adair County, IA | 4.0 TWh | 18 |
Net Generation data is based on the last 12 months since Mar 2026
