Iowa Counties

County Name Population
Adair County 7,059
Adams County 3,588
Allamakee County 13,642
Appanoose County 12,430
Audubon County 5,481
Benton County 25,414
Black Hawk County 130,786
Boone County 26,277
Bremer County 25,311
Buchanan County 21,287
Buena Vista County 19,772
Butler County 14,333
Calhoun County 9,473
Carroll County 19,914
Cass County 12,817
Cedar County 18,485
Cerro Gordo County 42,103
Cherokee County 11,190
Chickasaw County 11,834
Clarke County 9,353
Clay County 15,976
Clayton County 17,321
Clinton County 46,392
Crawford County 16,834
Dallas County 96,963
Davis County 9,051
Decatur County 7,769
Delaware County 16,937
Des Moines County 38,708
Dickinson County 17,549
Dubuque County 97,590
Emmet County 9,095
Fayette County 19,258
Floyd County 15,480
Franklin County 9,971
Fremont County 6,729
Greene County 8,795
Grundy County 12,217
Guthrie County 10,737
Hamilton County 14,716
Hancock County 10,507
Hardin County 16,575
Harrison County 13,928
Henry County 19,697
Howard County 9,176
Humboldt County 9,473
Ida County 6,833
Iowa County 16,138
Jackson County 19,205
Jasper County 37,148
Jefferson County 18,347
Johnson County 153,740
Jones County 20,617
Keokuk County 10,085
Kossuth County 14,680
Lee County 33,480
Linn County 227,854
Louisa County 11,011
Lucas County 8,518
Lyon County 11,756
Madison County 16,521
Mahaska County 22,370
Marion County 33,168
Marshall County 39,495
Mills County 14,766
Mitchell County 10,647
Monona County 8,598
Monroe County 7,770
Montgomery County 9,935
Muscatine County 42,394
O'Brien County 13,679
Osceola County 5,987
Page County 15,073
Palo Alto County 8,845
Plymouth County 25,219
Pocahontas County 6,607
Polk County 494,281
Pottawattamie County 93,328
Poweshiek County 18,381
Ringgold County 4,801
Sac County 9,603
Scott County 173,216
Shelby County 11,430
Sioux County 35,043
Story County 98,237
Tama County 16,801
Taylor County 6,092
Union County 12,157
Van Buren County 7,069
Wapello County 34,985
Warren County 52,265
Washington County 21,992
Wayne County 6,415
Webster County 35,934
Winnebago County 10,277
Winneshiek County 19,862
Woodbury County 103,138
Worth County 7,359
Wright County 12,416