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IOWA COUNTIES
There are 99 administrative divisions, referred to as counties, in the state of Iowa. The population figures given below are from the 2000 census. You may list the counties by county name, by area in square miles, by year organized or by population by clicking on the column headings or using the pull-down list box.
County Area (sq miles) County Seat Established Population (2000) Search
Adair County 569 Greenfield [ Map ] 1851 8,243 Search
Adams County 424 Corning [ Map ] 1851 4,482 Search
Allamakee County 640 Waukon [ Map ] 1847 14,675 Search
Appanoose County 496 Centerville [ Map ] 1843 13,721 Search
Audubon County 443 Audubon [ Map ] 1851 6,830 Search
Benton County 716 Vinton [ Map ] 1837 25,308 Search
Black Hawk County 567 Waterloo [ Map ] 1843 128,012 Search
Boone County 572 Boone [ Map ] 1846 26,224 Search
Bremer County 438 Waverly [ Map ] 1851 23,325 Search
Buchanan County 571 Independence [ Map ] 1837 21,093 Search
Buena Vista County 575 Storm Lake [ Map ] 1851 20,411 Search
Butler County 580 Allison [ Map ] 1851 15,305 Search
Calhoun County 570 Rockwell City [ Map ] 1851 11,115 Search
Carroll County 569 Carroll [ Map ] 1851 21,421 Search
Cass County 564 Atlantic [ Map ] 1851 14,684 Search
Cedar County 580 Tipton [ Map ] 1837 18,187 Search
Cerro Gordo County 568 Mason City [ Map ] 1851 46,447 Search
Cherokee County 577 Cherokee [ Map ] 1851 13,035 Search
Chickasaw County 505 New Hampton [ Map ] 1851 13,095 Search
Clarke County 431 Osceola [ Map ] 1846 9,133 Search
Clay County 569 Spencer [ Map ] 1851 17,372 Search
Clayton County 779 Elkader [ Map ] 1837 18,678 Search
Clinton County 695 Clinton [ Map ] 1837 50,149 Search
Crawford County 714 Denison [ Map ] 1851 16,942 Search
Dallas County 586 Adel [ Map ] 1846 40,750 Search
Davis County 503 Bloomfield [ Map ] 1843 8,541 Search
Decatur County 532 Leon [ Map ] 1846 8,689 Search
Delaware County 578 Manchester [ Map ] 1837 18,404 Search
Des Moines County 416 Burlington [ Map ] 1834 42,351 Search
Dickinson County 381 Spirit Lake [ Map ] 1851 16,424 Search
Dubuque County 608 Dubuque [ Map ] 1834 89,143 Search
Emmet County 396 Estherville [ Map ] 1851 11,027 Search
Fayette County 731 West Union [ Map ] 1837 22,008 Search
Floyd County 501 Charles City [ Map ] 1851 16,900 Search
Franklin County 582 Hampton [ Map ] 1851 10,704 Search
Fremont County 511 Sidney [ Map ] 1847 8,010 Search
Greene County 568 Jefferson [ Map ] 1851 10,366 Search
Grundy County 503 Grundy Center [ Map ] 1851 12,369 Search
Guthrie County 591 Guthrie Center [ Map ] 1851 11,353 Search
Hamilton County 577 Webster City [ Map ] 1856 16,438 Search
Hancock County 571 Garner [ Map ] 1851 12,100 Search
Hardin County 569 Eldora [ Map ] 1851 18,812 Search
Harrison County 697 Logan [ Map ] 1851 15,666 Search
Henry County 434 Mount Pleasant [ Map ] 1836 20,336 Search
Howard County 473 Cresco [ Map ] 1851 9,932 Search
Humboldt County 434 Dakota City [ Map ] 1851 10,381 Search
Ida County 432 Ida Grove [ Map ] 1851 7,837 Search
Iowa County 586 Marengo [ Map ] 1843 15,671 Search
Jackson County 636 Maquoketa [ Map ] 1837 20,296 Search
Jasper County 730 Newton [ Map ] 1846 37,213 Search
Jefferson County 435 Fairfield [ Map ] 1839 16,181 Search
Johnson County 614 Iowa City [ Map ] 1837 111,006 Search
Jones County 575 Anamosa [ Map ] 1837 20,221 Search
Keokuk County 579 Sigourney [ Map ] 1837 11,400 Search
Kossuth County 973 Algona [ Map ] 1851 17,163 Search
Lee County 517 Fort Madison [ Map ] 1836 38,052 Search
Linn County 718 Cedar Rapids [ Map ] 1837 191,701 Search
Louisa County 402