Iowa

Iowa has 99 Counties.

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  • Iowa State Association of Counties
    5500 Westown Parkway, Suite 190
    West Des Moines, IA 50266
    Phone: (515)244-7181
    Fax: (515)244-6397
    http://www.iowacounties.org/

    County NACo
    Member
    2010
    Population
    Square
    Miles
    County Seat Board
    Size
    Founded
    Adair 7,682 569 Greenfield   1851 
    Adams   4,029 423 Corning   1851 
    Allamakee 14,330 639 Waukon   1847 
    Appanoose 12,887 497 Centerville   1843 
    Audubon   6,119 443 Audubon   1851 
    Benton 26,076 716 Vinton   1837 
    Black Hawk 131,090 566 Waterloo   1843 
    Boone 26,306 572 Boone   1846 
    Bremer 24,276 435 Waverly   1851 
    Buchanan 20,958 571 Independence   1837 
    Buena Vista 20,260 575 Storm Lake   1851 
    Butler 14,867 580 Allison   1851 
    Calhoun 9,670 570 Rockwell City   1851 
    Carroll 20,816 569 Carroll   1851 
    Cass 13,956 564 Atlantic   1851 
    Cedar   18,499 579 Tipton   1837 
    Cerro Gordo 44,151 568 Mason City   1851 
    Cherokee 12,072 577 Cherokee   1851 
    Chickasaw 12,439 504 New Hampton   1851 
    Clarke 9,286 431 Osceola   1846 
    Clay 16,667 567 Spencer   1851 
    Clayton 18,129 779 Elkader   1837 
    Clinton 49,116 695 Clinton   1837 
    Crawford 17,096 714 Denison   1851 
    Dallas 66,135 588 Adel   1846 
    Davis 8,753 502 Bloomfield   1843 
    Decatur   8,457 532 Leon   1846 
    Delaware   17,764 578 Manchester  1837 
    Des Moines   40,325 416 Burlington  1834 
    Dickinson 16,667 381 Spirit Lake   1851 
    Dubuque 93,653 608 Dubuque   1834 
    Emmet 10,302 396 Estherville   1851 
    Fayette   20,880 731 West Union   1837 
    Floyd   16,303 501 Charles City   1851 
    Franklin 10,680 582 Hampton   1851 
    Fremont 7,441 511 Sidney   1847 
    Greene 9,336 570 Jefferson   1851 
    Grundy 12,453 502 Grundy Center   1851 
    Guthrie   10,954 591 Guthrie Center   1851 
    Hamilton 15,673 577 Webster City   1856 
    Hancock   11,341 571 Garner   1851 
    Hardin 17,534 569 Eldora   1851 
    Harrison 14,928 697 Logan   1851 
    Henry 20,145 434 Mount Pleasant   1836 
    Howard 9,566 473 Cresco   1851 
    Humboldt 9,815 434 Dakota City   1851 
    Ida   7,089 432 Ida Grove   1851 
    Iowa   16,355 586 Marengo   1843 
    Jackson 19,848 636 Maquoketa   1837 
    Jasper 36,842 730 Newton   1846 
    Jefferson 16,843 436 Fairfield   1839 
    Johnson 130,882 614 Iowa City   1837 
    Jones 20,638 576 Anamosa   1837 
    Keokuk   10,511 579 Sigourney   1837 
    Kossuth 15,543 973 Algona   1851 
    Lee   35,862 518 Fort Madison and Keokuk   1836 
    Linn 211,226 717 Cedar Rapids   1837 
    Louisa   11,387 402 Wapello   1836 
    Lucas 8,898 431 Chariton   1846 
    Lyon 11,581 588 Rock Rapids   1851 
    Madison   15,679 561 Winterset   1844 
    Mahaska   22,381 571 Oskaloosa   1843 
    Marion 33,309 555 Knoxville   1845 
    Marshall 40,648 573 Marshalltown   1846 
    Mills 15,059 437 Glenwood   1851 
    Mitchell 10,776 469 Osage   1851 
    Monona 9,243 694 Onawa   1851 
    Monroe 7,970 434 Albia   1843 
    Montgomery   10,740 424 Red Oak   1851 
    Muscatine   42,745 437 Muscatine   1836 
    O'Brien   14,398 573 Primghar   1851 
    Osceola   6,462 399 Sibley   1851 
    Page   15,932 535 Clarinda   1847 
    Palo Alto 9,421 564 Emmetsburg   1851 
    Plymouth 24,986 863 Le Mars   1851 
    Pocahontas 7,310 577 Pocahontas   1851 
    Polk 430,640 574 Des Moines   1846 
    Pottawattamie 93,158 950 Council Bluffs   1848 
    Poweshiek 18,914 585 Montezuma   1843 
    Ringgold 5,131 536 Mount Ayr   1855 
    Sac 10,350 575 Sac City   1851 
    Scott 165,224 458 Davenport   1837 
    Shelby 12,167 591 Harlan   1851 
    Sioux 33,704 768 Orange City   1851 
    Story 89,542 573 Nevada   1846 
    Tama 17,767 721 Toledo   1843 
    Taylor 6,317 532 Bedford   1847 
    Union 12,534 424 Creston   1851 
    Van Buren   7,570 485 Keosauqua   1836 
    Wapello 35,625 432 Ottumwa   1843 
    Warren 46,225 570 Indianola   1846 
    Washington 21,704 569 Washington  1837 
    Wayne 6,403 525 Corydon   1846 
    Webster 38,013 716 Fort Dodge   1853 
    Winnebago 10,866 400 Forest City   1847 
    Winneshiek 21,056 690 Decorah   1847 
    Woodbury 102,172 873 Sioux City  1851 
    Worth 7,598 400 Northwood   1851 
    Wright 13,229 580 Clarion   1851