Iowa Counties

County Name Population
Adair County 7,152
Adams County 3,602
Allamakee County 13,687
Appanoose County 12,426
Audubon County 5,496
Benton County 25,645
Black Hawk County 131,228
Boone County 26,234
Bremer County 25,062
Buchanan County 21,175
Buena Vista County 19,620
Butler County 14,439
Calhoun County 9,668
Carroll County 20,165
Cass County 12,836
Cedar County 18,627
Cerro Gordo County 42,450
Cherokee County 11,235
Chickasaw County 11,933
Clarke County 9,395
Clay County 16,016
Clayton County 17,549
Clinton County 46,429
Crawford County 16,820
Dallas County 93,453
Davis County 9,000
Decatur County 7,870
Delaware County 17,011
Des Moines County 38,967
Dickinson County 17,258
Dubuque County 97,311
Emmet County 9,208
Fayette County 19,650
Floyd County 15,642
Franklin County 10,070
Fremont County 6,960
Greene County 8,888
Grundy County 12,232
Guthrie County 10,689
Hamilton County 14,773
Hancock County 10,630
Hardin County 16,846
Harrison County 14,049
Henry County 19,954
Howard County 9,158
Humboldt County 9,558
Ida County 6,860
Iowa County 16,184
Jackson County 19,439
Jasper County 37,185
Jefferson County 18,295
Johnson County 151,140
Jones County 20,681
Keokuk County 10,246
Kossuth County 14,813
Lee County 33,657
Linn County 226,706
Louisa County 11,035
Lucas County 8,600
Lyon County 11,755
Madison County 16,338
Mahaska County 22,095
Marion County 33,253
Marshall County 39,369
Mills County 15,109
Mitchell County 10,586
Monona County 8,615
Monroe County 7,707
Montgomery County 9,917
Muscatine County 42,664
O'Brien County 13,753
Osceola County 5,958
Page County 15,107
Palo Alto County 8,886
Plymouth County 25,177
Pocahontas County 6,619
Polk County 490,161
Pottawattamie County 93,206
Poweshiek County 18,504
Ringgold County 4,894
Sac County 9,721
Scott County 172,943
Shelby County 11,454
Sioux County 34,855
Story County 97,117
Tama County 16,854
Taylor County 6,121
Union County 12,241
Van Buren County 7,044
Wapello County 34,969
Warren County 51,466
Washington County 21,965
Wayne County 6,441
Webster County 35,904
Winnebago County 10,354
Winneshiek County 19,991
Woodbury County 103,107
Worth County 7,381
Wright County 12,562