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County | FIPS Code | County Seat | Established in | Population | Area (sq mi) | Area (km2) |
---|---|---|---|---|---|---|
Adair County | 1 | Greenfield | Jan 15, 1851 | 7,682 | 569 | 1,474 |
Adams County | 3 | Corning | Jan 15, 1851 | 4,029 | 424 | 1,098 |
Allamakee County | 5 | Waukon | Feb 20, 1847 | 14,330 | 640 | 1,658 |
Appanoose County | 7 | Centerville | Feb 17, 1843 | 12,884 | 496 | 1,285 |
Audubon County | 9 | Audubon | Jan 15, 1851 | 6,119 | 443 | 1,147 |
Benton County | 11 | Vinton | Dec 21, 1837 | 26,076 | 716 | 1,854 |
Black Hawk County | 13 | Waterloo | Feb 17, 1843 | 131,090 | 567 | 1,469 |
Boone County | 15 | Boone | Jan 13, 1846 | 26,306 | 572 | 1,481 |
Bremer County | 17 | Waverly | Jan 15, 1851 | 24,276 | 428 | 1,109 |
Buchanan County | 19 | Independence | Dec 21, 1837 | 20,958 | 571 | 1,479 |
Buena Vista County | 21 | Storm Lake | Jan 15, 1851 | 20,260 | 575 | 1,489 |
Butler County | 23 | Allison | Jan 15, 1851 | 14,867 | 580 | 1,502 |
Calhoun County | 25 | Rockwell City | Jan 15, 1851 | 9,670 | 570 | 1,476 |
Carroll County | 27 | Carroll | Jan 15, 1851 | 20,816 | 569 | 1,474 |
Cass County | 29 | Atlantic | Jan 15, 1851 | 13,956 | 564 | 1,461 |
Cedar County | 31 | Tipton | Dec 21, 1837 | 18,499 | 580 | 1,502 |
Cerro Gordo County | 33 | Mason City | Jan 15, 1851 | 44,151 | 568 | 1,471 |
Cherokee County | 35 | Cherokee | Jan 15, 1851 | 12,072 | 577 | 1,494 |
Chickasaw County | 37 | New Hampton | Jan 15, 1851 | 12,439 | 505 | 1,308 |
Clarke County | 39 | Osceola | Jan 13, 1846 | 9,286 | 431 | 1,116 |
Clay County | 41 | Spencer | Jan 15, 1851 | 16,667 | 569 | 1,474 |
Clayton County | 43 | Elkader | Dec 21, 1837 | 18,129 | 779 | 2,018 |
Clinton County | 45 | Clinton | Dec 21, 1837 | 49,116 | 695 | 1,800 |
Crawford County | 47 | Denison | Jan 15, 1851 | 17,096 | 714 | 1,849 |
Dallas County | 49 | Adel | Jan 13, 1846 | 66,135 | 586 | 1,518 |
Davis County | 51 | Bloomfield | Feb 17, 1843 | 8,753 | 503 | 1,303 |
Decatur County | 53 | Leon | Jan 13, 1846 | 8,457 | 532 | 1,378 |
Delaware County | 55 | Manchester | Dec 21, 1837 | 17,764 | 578 | 1,497 |
Des Moines County | 57 | Burlington | Sep 6, 1834 | 40,325 | 416 | 1,077 |
Dickinson County | 59 | Spirit Lake | Jan 15, 1851 | 16,667 | 381 | 987 |
Dubuque County | 61 | Dubuque | Sep 6, 1834 | 93,653 | 608 | 1,575 |
Emmet County | 63 | Estherville | Jan 15, 1851 | 10,302 | 396 | 1,026 |
Fayette County | 65 | West Union | Dec 21, 1837 | 20,880 | 731 | 1,893 |
Floyd County | 67 | Charles City | Jan 15, 1851 | 16,303 | 501 | 1,298 |
Franklin County | 69 | Hampton | Jan 15, 1851 | 10,680 | 582 | 1,507 |
Fremont County | 71 | Sidney | Feb 24, 1847 | 7,441 | 511 | 1,323 |
Greene County | 73 | Jefferson | Jan 15, 1851 | 9,336 | 568 | 1,471 |
Grundy County | 75 | Grundy Center | Jan 15, 1851 | 12,453 | 503 | 1,303 |
Guthrie County | 77 | Guthrie Center | Jul 8, 1851 | 10,954 | 591 | 1,531 |
Hamilton County | 79 | Webster City | Dec 22, 1856 | 15,673 | 577 | 1,494 |
Hancock County | 81 | Garner | Jan 15, 1851 | 11,341 | 571 | 1,479 |
Hardin County | 83 | Eldora | Jan 15, 1851 | 17,534 | 569 | 1,474 |
Harrison County | 85 | Logan | Jan 15, 1851 | 14,928 | 697 | 1,805 |
Henry County | 87 | Mount Pleasant | Dec 7, 1836 | 20,145 | 434 | 1,124 |
Howard County | 89 | Cresco | Jan 15, 1851 | 9,566 | 473 | 1,225 |
Humboldt County | 91 | Dakota City | Feb 26, 1857 | 9,815 | 434 | 1,124 |
Ida County | 93 | Ida Grove | Jan 15, 1851 | 7,089 | 432 | 1,119 |
Iowa County | 95 | Marengo | Feb 17, 1843 | 16,355 | 586 | 1,518 |
Jackson County | 97 | Maquoketa | Dec 21, 1837 | 19,848 | 636 | 1,647 |
Jasper County | 99 | Newton | Jan 13, 1846 | 36,842 | 730 | 1,891 |
Jefferson County | 101 | Fairfield | Jan 21, 1839 | 16,843 | 435 | 1,127 |
Johnson County | 103 | Iowa City | Dec 21, 1837 | 130,882 | 614 | 1,590 |
Jones County | 105 | Anamosa | Dec 21, 1837 | 20,638 | 575 | 1,489 |
Keokuk County | 107 | Sigourney | Dec 21, 1837 | 10,511 | 579 | 1,500 |
Kossuth County | 109 | Algona | Jan 15, 1851 | 15,543 | 973 | 2,520 |
Lee County | 111 | Fort Madison and Keokuk | Dec 7, 1836 | 35,862 | 517 | 1,339 |
Linn County | 113 | Cedar Rapids | Dec 21, 1837 | 211,226 | 718 | 1,860 |
Louisa County | 115 | Wapello | Dec 7, 1836 | 11,387 | 402 | 1,041 |
Lucas County | 117 | Chariton | Jan 13, 1846 | 8,898 | 431 | 1,116 |
Lyon County | 119 | Rock Rapids | Jan 15, 1851 | 11,581 | 588 | 1,523 |
Madison County | 121 | Winterset | Jan 13, 1846 | 15,679 | 561 | 1,453 |
Mahaska County | 123 | Oskaloosa | Feb 17, 1843 | 22,381 | 571 | 1,479 |
Marion County | 125 | Knoxville | Jun 10, 1845 | 33,309 | 554 | 1,435 |
Marshall County | 127 | Marshalltown | Jan 13, 1846 | 40,648 | 572 | 1,481 |
Mills County | 129 | Glenwood | Jan 15, 1851 | 15,059 | 437 | 1,132 |
Mitchell County | 131 | Osage | Jan 15, 1851 | 10,776 | 469 | 1,215 |
Monona County | 133 | Onawa | Jan 15, 1851 | 9,243 | 693 | 1,795 |
Monroe County | 135 | Albia | Feb 17, 1843 | 7,970 | 433 | 1,121 |
Montgomery County | 137 | Red Oak | Jan 15, 1851 | 10,740 | 424 | 1,098 |
Muscatine County | 139 | Muscatine | Dec 7, 1836 | 42,745 | 439 | 1,137 |
O'Brien County | 141 | Primghar | Jan 15, 1851 | 14,398 | 573 | 1,484 |
Osceola County | 143 | Sibley | Jan 15, 1851 | 6,462 | 399 | 1,033 |
Page County | 145 | Clarinda | Feb 24, 1847 | 15,932 | 535 | 1,386 |
Palo Alto County | 147 | Emmetsburg | Jan 15, 1851 | 9,421 | 564 | 1,461 |
Plymouth County | 149 | Le Mars | Jan 15, 1851 | 24,986 | 864 | 2,238 |
Pocahontas County | 151 | Pocahontas | Jan 15, 1851 | 7,310 | 578 | 1,497 |
Polk County | 153 | Des Moines | Jan 13, 1846 | 430,640 | 570 | 1,476 |
Pottawattamie County | 155 | Council Bluffs | Feb 24, 1847 | 93,158 | 954 | 2,471 |
Poweshiek County | 157 | Montezuma | Feb 17, 1843 | 18,914 | 585 | 1,515 |
Ringgold County | 159 | Mount Ayr | Feb 24, 1847 | 5,131 | 538 | 1,393 |
Sac County | 161 | Sac City | Jan 15, 1851 | 10,350 | 576 | 1,492 |
Scott County | 163 | Davenport | Dec 21, 1837 | 165,224 | 458 | 1,186 |
Shelby County | 165 | Harlan | Jan 15, 1851 | 12,167 | 591 | 1,531 |
Sioux County | 167 | Orange City | Jan 15, 1851 | 33,704 | 768 | 1,989 |
Story County | 169 | Nevada | Jan 13, 1846 | 89,542 | 573 | 1,484 |
Tama County | 171 | Toledo | Feb 17, 1843 | 17,767 | 721 | 1,867 |
Taylor County | 173 | Bedford | Feb 24, 1847 | 6,317 | 534 | 1,383 |
Union County | 175 | Creston | Jan 15, 1851 | 12,534 | 424 | 1,098 |
Van Buren County | 177 | Keosauqua | Dec 7, 1836 | 7,570 | 485 | 1,256 |
Wapello County | 179 | Ottumwa | Feb 17, 1843 | 35,625 | 432 | 1,119 |
Warren County | 181 | Indianola | Jan 13, 1846 | 46,225 | 572 | 1,481 |
Washington County | 183 | Washington | Jan 25, 1839 | 21,704 | 569 | 1,474 |
Wayne County | 185 | Corydon | Jan 13, 1846 | 6,403 | 526 | 1,362 |
Webster County | 187 | Fort Dodge | Jan 12, 1853 | 38,013 | 715 | 1,852 |
Winnebago County | 189 | Forest City | Jan 15, 1851 | 10,866 | 400 | 1,036 |
Winneshiek County | 191 | Decorah | Feb 20, 1847 | 21,056 | 690 | 1,787 |
Woodbury County | 193 | Sioux City | Jan 12, 1853 | 102,172 | 873 | 2,261 |
Worth County | 195 | Northwood | Jan 15, 1851 | 7,598 | 400 | 1,036 |
Wright County | 197 | Clarion | Jan 15, 1851 | 13,229 | 581 | 1,505 |