List of Counties in Iowa - County Information

County Information

The number in the column headed "#" is the one used on the map from the National Atlas of the United States, shown on the left. The Federal Information Processing Standard (FIPS) code, which is used by the United States government to uniquely identify counties, is provided with each entry. The FIPS code for each county links to census data for that county.

County
 FIPS code
 County seat
 #
 Established
 Formed from
 Etymology
 Population
 Area
 Map
Adair County 001 Greenfield 69 01851-01-15January 15, 1851 Cass County John Adair (1757–1840), sixth governor of Kentucky 70037682000000000007,682 7002569000000000000569 sq mi
(70031474000000000001,474 km2)
Adams County 003 Corning 81 01851-01-15January 15, 1851 Taylor County John Adams, second President of the United States (1797–1801) 70034029000000000004,029 7002424000000000000424 sq mi
(70031098000000000001,098 km2)
Allamakee County 005 Waukon 11 01847-02-20February 20, 1847 Clayton County Disputed, possibly named for Allan Makee, an early Indian trader and guide for early settlers 700414330000000000014,330 7002640000000000000640 sq mi
(70031658000000000001,658 km2)
Appanoose County 007 Centerville 96 01843-02-17February 17, 1843 Davis County Appanoose, Native American chief who headed peace party in the Black Hawk War 700412884000000000012,884 7002496000000000000496 sq mi
(70031285000000000001,285 km2)


Audubon County 009 Audubon 57 01851-01-15January 15, 1851 Black Hawk County and Cass County John James Audubon (1785–1851), ornithologist and artist 70036119000000000006,119 7002443000000000000443 sq mi
(70031147000000000001,147 km2)
Benton County 011 Vinton 51 01837-12-21December 21, 1837 Native American lands and Wisconsin Territory Thomas Hart Benton, United States Senator (1821–1851) 700426076000000000026,076 7002716000000000000716 sq mi
(70031854000000000001,854 km2)
Black Hawk County 013 Waterloo 39 01843-02-17February 17, 1843 Delaware County Black Hawk (1767–1838), chief of Fox and Sac Indians and leader in the Black Hawk War 7005131090000000000131,090 7002567000000000000567 sq mi
(70031469000000000001,469 km2)
Boone County 015 Boone 47 01846-01-13January 13, 1846 Polk County Nathan Boone (1781–1863), one of the first to survey Iowa 700426306000000000026,306 7002572000000000000572 sq mi
(70031481000000000001,481 km2)
Bremer County 017 Waverly 30 01851-01-15January 15, 1851 Native American lands and Winnebago County Fredrika Bremer (1801–1865), Swedish poet and author 700424276000000000024,276 7002428000000000000428 sq mi
(70031109000000000001,109 km2)
Buchanan County 019 Independence 40 01837-12-21December 21, 1837 Delaware County and Wisconsin Territory James Buchanan, fifteenth President of the United States (1857–1861) 700420958000000000020,958 7002571000000000000571 sq mi
(70031479000000000001,479 km2)
Buena Vista County 021 Storm Lake 24 01851-01-15January 15, 1851 Clay County and Sac County Battle of Buena Vista, a battle during the Mexican-American War 700420260000000000020,260 7002575000000000000575 sq mi
(70031489000000000001,489 km2)
Butler County 023 Allison 29 01851-01-15January 15, 1851 Black Hawk County and Buchanan County William Orlando Butler (1791–1880), War of 1812 hero and unsuccessful candidate for Vice President 700414867000000000014,867 7002580000000000000580 sq mi
(70031502000000000001,502 km2)
Calhoun County 025 Rockwell City 34 01851-01-15January 15, 1851 Fox County (renamed) John Caldwell Calhoun, Vice President of the United States (1825–1832) 70039670000000000009,670 7002570000000000000570 sq mi
(70031476000000000001,476 km2)
Carroll County 027 Carroll 45 01851-01-15January 15, 1851 Guthrie County Charles Carroll (1737–1832), longest lived signatory of the Declaration of Independence 700420816000000000020,816 7002569000000000000569 sq mi
(70031474000000000001,474 km2)
Cass County 029 Atlantic 68 01851-01-15January 15, 1851 Pottawattamie County Lewis Cass, United States Senator from Michigan and unsuccessful candidate for President (1848) 700413956000000000013,956 7002564000000000000564 sq mi
(70031461000000000001,461 km2)
Cedar County 031 Tipton 65 01837-12-21December 21, 1837 Wisconsin Territory Red Cedar River, river which runs through county 700418499000000000018,499 7002580000000000000580 sq mi
(70031502000000000001,502 km2)
Cerro Gordo County 033 Mason City 17 01851-01-15January 15, 1851 Floyd County Battle of Cerro Gordo, battle during the Mexican-American War 700444151000000000044,151 7002568000000000000568 sq mi
(70031471000000000001,471 km2)
Cherokee County 035 Cherokee 23 01851-01-15January 15, 1851 Crawford County Cherokee Native American tribe 700412072000000000012,072 7002577000000000000577 sq mi
(70031494000000000001,494 km2)
Chickasaw County 037 New Hampton 19 01851-01-15January 15, 1851 Fayette County Chickasaw Native American tribe 700412439000000000012,439 7002505000000000000505 sq mi
(70031308000000000001,308 km2)
Clarke County 039 Osceola 83 01846-01-13January 13, 1846 Lucas County James Clarke, third Governor of Iowa Territory (1845–1846) 70039286000000000009,286 7002431000000000000431 sq mi
(70031116000000000001,116 km2)
Clay County 041 Spencer 14 01851-01-15January 15, 1851 Native American lands Henry Clay, Jr. (1807–1847), officer in the Mexican-American War 700416667000000000016,667 7002569000000000000569 sq mi
(70031474000000000001,474 km2)
Clayton County 043 Elkader 21 01837-12-21December 21, 1837 Dubuque County and Wisconsin Territory John M. Clayton (1796–1856), United States Senator from Delaware 700418129000000000018,129 7002779000000000000779 sq mi
(70032018000000000002,018 km2)
Clinton County 045 Clinton 66 01837-12-21December 21, 1837 Dubuque County and Wisconsin Territory DeWitt Clinton (1769–1828), Governor of New York 700449116000000000049,116 7002695000000000000695 sq mi
(70031800000000000001,800 km2)
Crawford County 047 Denison 44 01851-01-15January 15, 1851 Shelby County William Harris Crawford (1772–1834), United States Senator from Georgia 700417096000000000017,096 7002714000000000000714 sq mi
(70031849000000000001,849 km2)
Dallas County 049 Adel 59 01846-01-13January 13, 1846 Polk County George Mifflin Dallas (1792–1864), eleventh Vice President of the United States 700466135000000000066,135 7002586000000000000586 sq mi
(70031518000000000001,518 km2)
Davis County 051 Bloomfield 97 01843-02-17February 17, 1843 Van Buren County Garrett Davis (1801–1872), congressman 70038753000000000008,753 7002503000000000000503 sq mi
(70031303000000000001,303 km2)
Decatur County 053 Leon 94 01846-01-13January 13, 1846 Appanoose County Stephen Decatur (1779–1820), naval officer in the War of 1812 70038457000000000008,457 7002532000000000000532 sq mi
(70031378000000000001,378 km2)
Delaware County 055 Manchester 41 01837-12-21December 21, 1837 Dubuque County and Wisconsin Territory State of Delaware, home of Iowa statehood advocate U.S. Senator John M. Clayton 700417764000000000017,764 7002578000000000000578 sq mi
(70031497000000000001,497 km2)
Des Moines County 057 Burlington 89 01834-09-06September 6, 1834 Michigan Territory and Wisconsin Territory Des Moines River, river that once ran through the county 700440325000000000040,325 7002416000000000000416 sq mi
(70031077000000000001,077 km2)
Dickinson County 059 Spirit Lake 3 01851-01-15January 15, 1851 Kossuth County Daniel Stevens Dickinson (1800–1866), United States Senator from New York 700416667000000000016,667 7002381000000000000381 sq mi
(7002987000000000000987 km2)
Dubuque County 061 Dubuque 42 01834-09-06September 6, 1834 Michigan Territory and Wisconsin Territory Julien Dubuque (1762–1810), first permanent white settler in Iowa 700493653000000000093,653 7002608000000000000608 sq mi
(70031575000000000001,575 km2)
Emmet County 063 Estherville 4 01851-01-15January 15, 1851 Dickinson County and Kossuth County Robert Emmet (1778–1803), Irish revolutionary and American republican sympathizer 700410302000000000010,302 7002396000000000000396 sq mi
(70031026000000000001,026 km2)
Fayette County 065 West Union 20 01837-12-21December 21, 1837 Clayton County and Wisconsin Territory Marquis de Lafayette (1757–1834), Frenchman who aided colonial forces during the American Revolutionary War 700420880000000000020,880 7002731000000000000731 sq mi
(70031893000000000001,893 km2)
Floyd County 067 Charles City 18 01851-01-15January 15, 1851 Chickasaw County Charles Floyd (1782–1804), member of the Lewis and Clark Expedition who died in Iowa 700416303000000000016,303 7002501000000000000501 sq mi
(70031298000000000001,298 km2)
Franklin County 069 Hampton 28 01851-01-15January 15, 1851 Chickasaw County Benjamin Franklin (1706–1790), statesman and U.S. founding father 700410680000000000010,680 7002582000000000000582 sq mi
(70031507000000000001,507 km2)
Fremont County 071 Sidney 90 01847-02-24February 24, 1847 Pottawattamie County John Charles Fremont (1813–1890), officer in Mexican-American War 70037441000000000007,441 7002511000000000000511 sq mi
(70031323000000000001,323 km2)
Greene County 073 Jefferson 46 01851-01-15January 15, 1851 Dallas County Nathanael Greene (1742–1786), American Revolutionary War general 70039336000000000009,336 7002568000000000000568 sq mi
(70031471000000000001,471 km2)
Grundy County 075 Grundy Center 38 01851-01-15January 15, 1851 Black Hawk County Felix Grundy (1777–1840), United States Senator 700412453000000000012,453 7002503000000000000503 sq mi
(70031303000000000001,303 km2)
Guthrie County 077 Guthrie Center 58 01851-07-08July 8, 1851 Jackson County Edwin B. Guthrie, officer in Mexican-American War 700410954000000000010,954 7002591000000000000591 sq mi
(70031531000000000001,531 km2)
Hamilton County 079 Webster City 36 01856-12-22December 22, 1856 Webster County William W. Hamilton, President of the Iowa Senate (1856–1857) 700415673000000000015,673 7002577000000000000577 sq mi
(70031494000000000001,494 km2)
Hancock County 081 Garner 16 01851-01-15January 15, 1851 Wright County John Hancock (1737–1793), President of the First Continental Congress 700411341000000000011,341 7002571000000000000571 sq mi
(70031479000000000001,479 km2)
Hardin County 083 Eldora 37 01851-01-15January 15, 1851 Black Hawk County John J. Hardin (1810–1847), prominent soldier in the Black Hawk War 700417534000000000017,534 7002569000000000000569 sq mi
(70031474000000000001,474 km2)
Harrison County 085 Logan 55 01851-01-15January 15, 1851 Pottawattamie County William Henry Harrison (1773–1841), ninth President of the United States 700414928000000000014,928 7002697000000000000697 sq mi
(70031805000000000001,805 km2)
Henry County 087 Mount Pleasant 88 01836-12-07December 7, 1836 Wisconsin Territory Disputed; either Henry Dodge (1782–1867), governor of Wisconsin Territory; or James Dougherty Henry, general in the Black Hawk War 700420145000000000020,145 7002434000000000000434 sq mi
(70031124000000000001,124 km2)
Howard County 089 Cresco 9 01851-01-15January 15, 1851 Chickasaw County Tilghman Ashurst Howard (1797–1844), congressman 70039566000000000009,566 7002473000000000000473 sq mi
(70031225000000000001,225 km2)
Humboldt County 091 Dakota City 26 01857-02-26February 26, 1857 Webster County Alexander von Humboldt (1769–1859), German scientist 70039815000000000009,815 7002434000000000000434 sq mi
(70031124000000000001,124 km2)
Ida County 093 Ida Grove 32 01851-01-15January 15, 1851 Cherokee County Mount Ida in Greece 70037089000000000007,089 7002432000000000000432 sq mi
(70031119000000000001,119 km2)
Iowa County 095 Marengo 63 01843-02-17February 17, 1843 Washington County Iowa River, river that flows through the county, and which is itself named for the Ioway Native American tribe 700416355000000000016,355 7002586000000000000586 sq mi
(70031518000000000001,518 km2)
Jackson County 097 Maquoketa 54 01837-12-21December 21, 1837 Wisconsin Territory Andrew Jackson (1767–1845), seventh President of the United States 700419848000000000019,848 7002636000000000000636 sq mi
(70031647000000000001,647 km2)
Jasper County 099 Newton 61 01846-01-13January 13, 1846 Mahaska County William Jasper (1750–1779), sergeant in the American Revolutionary War 700436842000000000036,842 7002730000000000000730 sq mi
(70031891000000000001,891 km2)
Jefferson County 101 Fairfield 87 01839-01-21January 21, 1839 Native American lands Thomas Jefferson (1743–1826), third President of the United States 700416843000000000016,843 7002435000000000000435 sq mi
(70031127000000000001,127 km2)
Johnson County 103 Iowa City 64 01837-12-21December 21, 1837 Des Moines County, Iowa and Wisconsin Territory Richard Mentor Johnson (1780–1850), Vice President of the United States 1837-1841 7005130882000000000130,882 7002614000000000000614 sq mi
(70031590000000000001,590 km2)
Jones County 105 Anamosa 53 01837-12-21December 21, 1837 Wisconsin Territory George Wallace Jones (1804–1896), United States Senator from Iowa 700420638000000000020,638 7002575000000000000575 sq mi
(70031489000000000001,489 km2)
Keokuk County 107 Sigourney 74 01837-12-21December 21, 1837 Washington County Keokuk (1767–1848), chief of the Sac Native American tribe 700410511000000000010,511 7002579000000000000579 sq mi
(70031500000000000001,500 km2)
Kossuth County 109 Algona 5 01851-01-15January 15, 1851 Webster County Lajos Kossuth (1802–1894), Hungarian revolutionary who was inspired by American democratic ideals 700415543000000000015,543 7002973000000000000973 sq mi
(70032520000000000002,520 km2)
Lee County 111 Fort Madison and Keokuk 99 01836-12-07December 7, 1836 Des Moines County William Elliott Lee, businessman from the New York Land Company, which sold the county's first tracts of land 700435862000000000035,862 7002517000000000000517 sq mi
(70031339000000000001,339 km2)
Linn County 113 Cedar Rapids 52 01837-12-21December 21, 1837 Wisconsin Territory Lewis Fields Linn (1795–1843), doctor and United States Senator from Missouri 7005211226000000000211,226 7002718000000000000718 sq mi
(70031860000000000001,860 km2)
Louisa County 115 Wapello 76 01836-12-07December 7, 1836 Des Moines County Disputed; either Louisa Massey, a woman then famous for avenging the death of her brother; or Louisa County, Virginia 700411387000000000011,387 7002402000000000000402 sq mi
(70031041000000000001,041 km2)
Lucas County 117 Chariton 84 01846-01-13January 13, 1846 Monroe County Robert Lucas (1781–1853), first Governor of Iowa Territory 70038898000000000008,898 7002431000000000000431 sq mi
(70031116000000000001,116 km2)
Lyon County 119 Rock Rapids 1 01851-01-15January 15, 1851 Woodbury County, Iowa Nathaniel Lyon (1818–1861), first Union general to be killed in the American Civil War, (formerly named Buncombe County) 700411581000000000011,581 7002588000000000000588 sq mi
(70031523000000000001,523 km2)
Madison County 121 Winterset 70 01846-01-13January 13, 1846 Polk County James Madison (1751–1836), fourth President of the United States 700415679000000000015,679 7002561000000000000561 sq mi
(70031453000000000001,453 km2)
Mahaska County 123 Oskaloosa 73 01843-02-17February 17, 1843 Fox and Sac Indian lands Mahaska (1784–1834), chief of the Ioway Native American tribe 700422381000000000022,381 7002571000000000000571 sq mi
(70031479000000000001,479 km2)
Marion County 125 Knoxville 72 01845-06-10June 10, 1845 Washington County Francis Marion (1732–1795), general in the American Revolutionary War 700433309000000000033,309 7002554000000000000554 sq mi
(70031435000000000001,435 km2)
Marshall County 127 Marshalltown 49 01846-01-13January 13, 1846 Jasper County John Marshall (1755–1835), fourth Chief Justice of the United States Supreme Court 700440648000000000040,648 7002572000000000000572 sq mi
(70031481000000000001,481 km2)
Mills County 129 Glenwood 79 01851-01-15January 15, 1851 Pottawattamie County Frederick Mills, major killed during the Battle of Churubusco in the Mexican-American War 700415059000000000015,059 7002437000000000000437 sq mi
(70031132000000000001,132 km2)
Mitchell County 131 Osage 8 01851-01-15January 15, 1851 Chickasaw County John Mitchel (1815–1875), Irish revolutionary who for a time operated out of the United States 700410776000000000010,776 7002469000000000000469 sq mi
(70031215000000000001,215 km2)
Monona County 133 Onawa 43 01851-01-15January 15, 1851 Harrison County Word of Native American origin that perhaps translates to "peaceful valley" 70039243000000000009,243 7002693000000000000693 sq mi
(70031795000000000001,795 km2)
Monroe County 135 Albia 85 01843-02-17February 17, 1843 Wapello County James Monroe (1758–1831), fifth President of the United States 70037970000000000007,970 7002433000000000000433 sq mi
(70031121000000000001,121 km2)
Montgomery County 137 Red Oak 80 01851-01-15January 15, 1851 Polk County Richard Montgomery (1738–1775), general in the American Revolutionary War 700410740000000000010,740 7002424000000000000424 sq mi
(70031098000000000001,098 km2)
Muscatine County 139 Muscatine 77 01836-12-07December 7, 1836 Des Moines County Muscatine Native American tribe 700442745000000000042,745 7002439000000000000439 sq mi
(70031137000000000001,137 km2)
O'Brien County 141 Primghar 13 01851-01-15January 15, 1851 Cherokee County William Smith O'Brien (1803–1864), Irish revolutionary who was inspired by American democratic ideals 700414398000000000014,398 7002573000000000000573 sq mi
(70031484000000000001,484 km2)
Osceola County 143 Sibley 2 01851-01-15January 15, 1851 Woodbury County Osceola (1804–1838), Native American leader 70036462000000000006,462 7002399000000000000399 sq mi
(70031033000000000001,033 km2)
Page County 145 Clarinda 91 01847-02-24February 24, 1847 Pottawattamie County John Page, officer killed in Battle of Palo Alto in the Mexican-American War 700415932000000000015,932 7002535000000000000535 sq mi
(70031386000000000001,386 km2)
Palo Alto County 147 Emmetsburg 15 01851-01-15January 15, 1851 Kossuth County Battle of Palo Alto in the Mexican-American War 70039421000000000009,421 7002564000000000000564 sq mi
(70031461000000000001,461 km2)
Plymouth County 149 Le Mars 22 01851-01-15January 15, 1851 Woodbury County Landing place of the Pilgrims who came to America on the Mayflower 700424986000000000024,986 7002864000000000000864 sq mi
(70032238000000000002,238 km2)
Pocahontas County 151 Pocahontas 25 01851-01-15January 15, 1851 Greene County and Humboldt County Pocahantas (1595–1618), famous Native American woman 70037310000000000007,310 7002578000000000000578 sq mi
(70031497000000000001,497 km2)
Polk County 153 Des Moines 60 01846-01-13January 13, 1846 Native American lands James K. Polk (1795–1849), eleventh President of the United States 7005430640000000000430,640 7002570000000000000570 sq mi
(70031476000000000001,476 km2)
Pottawattamie County 155 Council Bluffs 67 01847-02-24February 24, 1847 Native American lands Pottawattamie Native American tribe 700493158000000000093,158 7002954000000000000954 sq mi
(70032471000000000002,471 km2)
Poweshiek County 157 Montezuma 62 01843-02-17February 17, 1843 Mesquakie Indian lands Poweshiek, chief of the Fox tribe 700418914000000000018,914 7002585000000000000585 sq mi
(70031515000000000001,515 km2)
Ringgold County 159 Mount Ayr 93 01847-02-24February 24, 1847 Taylor County Samuel Ringgold (1796–1846), major killed in the Mexican-American War 70035131000000000005,131 7002538000000000000538 sq mi
(70031393000000000001,393 km2)
Sac County 161 Sac City 33 01851-01-15January 15, 1851 Greene County Sac Native American tribe 700410350000000000010,350 7002576000000000000576 sq mi
(70031492000000000001,492 km2)
Scott County 163 Davenport 78 01837-12-21December 21, 1837 Wisconsin Territory Winfield Scott (1786–1866), U.S. Army General during the War of 1812 7005165224000000000165,224 7002458000000000000458 sq mi
(70031186000000000001,186 km2)
Shelby County 165 Harlan 56 01851-01-15January 15, 1851 Cass County Isaac Shelby (1750–1826), general in the American Revolutionary War and the War of 1812 700412167000000000012,167 7002591000000000000591 sq mi
(70031531000000000001,531 km2)
Sioux County 167 Orange City 12 01851-01-15January 15, 1851 Plymouth County Sioux Native American tribe 700433704000000000033,704 7002768000000000000768 sq mi
(70031989000000000001,989 km2)
Story County 169 Nevada 48 01846-01-13January 13, 1846 Boone County, Jasper County, and Polk County Joseph Story (1779–1845), United States Supreme Court justice 700489542000000000089,542 7002573000000000000573 sq mi
(70031484000000000001,484 km2)
Tama County 171 Toledo 50 01843-02-17February 17, 1843 Benton County and Boone County Disputed; either Taimah, Fox chief; or Taomah, wife of Poweshiek 700417767000000000017,767 7002721000000000000721 sq mi
(70031867000000000001,867 km2)
Taylor County 173 Bedford 92 01847-02-24February 24, 1847 Page County Zachary Taylor (1784–1850), twelfth President of the United States 70036317000000000006,317 7002534000000000000534 sq mi
(70031383000000000001,383 km2)
Union County 175 Creston 82 01851-01-15January 15, 1851 Clarke County The union of the states 700412534000000000012,534 7002424000000000000424 sq mi
(70031098000000000001,098 km2)
Van Buren County 177 Keosauqua 98 01836-12-07December 7, 1836 Des Moines County Martin Van Buren (1782–1862), eighth President of the United States 70037570000000000007,570 7002485000000000000485 sq mi
(70031256000000000001,256 km2)
Wapello County 179 Ottumwa 86 01843-02-17February 17, 1843 Native American lands Wapello, chief of the Fox Native American tribe 700435625000000000035,625 7002432000000000000432 sq mi
(70031119000000000001,119 km2)
Warren County 181 Indianola 71 01846-01-13January 13, 1846 Polk County Joseph Warren (1741–1775), General in the American Revolutionary War 700446225000000000046,225 7002572000000000000572 sq mi
(70031481000000000001,481 km2)
Washington County 183 Washington 75 01839-01-25January 25, 1839 Wisconsin Territory George Washington (1732–1799), first President of the United States 700421704000000000021,704 7002569000000000000569 sq mi
(70031474000000000001,474 km2)
Wayne County 185 Corydon 95 01846-01-13January 13, 1846 Appanoose County Anthony Wayne (1745–1796), General in the American Revolutionary War 70036403000000000006,403 7002526000000000000526 sq mi
(70031362000000000001,362 km2)
Webster County 187 Fort Dodge 35 01853-01-12January 12, 1853 Risley County and Yell County (defunct counties) Daniel Webster (1782–1852), U.S. Senator from Massachusetts 700438013000000000038,013 7002715000000000000715 sq mi
(70031852000000000001,852 km2)
Winnebago County 189 Forest City 6 01851-01-15January 15, 1851 Kossuth County Winnebago Native American tribe 700410866000000000010,866 7002400000000000000400 sq mi
(70031036000000000001,036 km2)
Winneshiek County 191 Decorah 10 01847-02-20February 20, 1847 Native American lands Winneshiek, chief of the Winnebago Native American tribe 700421056000000000021,056 7002690000000000000690 sq mi
(70031787000000000001,787 km2)
Woodbury County 193 Sioux City 31 01853-01-12January 12, 1853 Polk County Levi Woodbury (1789–1851), Governor of New Hampshire, (formerly named Wahkaw County) 7005102172000000000102,172 7002873000000000000873 sq mi
(70032261000000000002,261 km2)
Worth County 195 Northwood 7 01851-01-15January 15, 1851 Mitchell County William Jenkins Worth (1794–1849), officer in the Black Hawk War and the Mexican-American War 70037598000000000007,598 7002400000000000000400 sq mi
(70031036000000000001,036 km2)
Wright County 197 Clarion 27 01851-01-15January 15, 1851 Webster County and Kossuth County Silas Wright (1795–1847), Governor of New York, and Joseph Albert Wright (1810–1867), Governor of Indiana, brothers 700413229000000000013,229 7002581000000000000581 sq mi
(70031505000000000001,505 km2)

Read more about this topic:  List Of Counties In Iowa

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