The Iowa Constitution of 1857, which is still in effect today, states that counties must have an area of at least 432 square miles, nor can any county be reduced below that size by boundary changes.[6] However, exceptions to this rule were granted, as ten counties have areas below this size. (The table below shows land area, but the Constitution deals with total area.[6]) The smallest county (Dickinson) has a land area of 381 sq mi (987 km²), while the largest (Kossuth) has an area 973sq mi (2,520 km²). Polk county is the most densely populated county at 657 persons/sq mi[7], and contains the state's capital and largest city, Des Moines.
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
[8] |
County seat
[4] |
#
|
Established
[4][9] |
Formed from
[10] |
Etymology
[9] |
Population
[4] |
Area
[4] |
Map
|
| Adair County |
001 |
Greenfield |
69 |
01851-01-15 January 15, 1851 |
Cass County |
John Adair (1757–1840), sixth governor of Kentucky |
&0000000000008243.0000008,243 |
&0000000000000569.000000569 sq mi
(&0000000000001474.0000001,474 km²) |
 |
| Adams County |
003 |
Corning |
81 |
01851-01-15 January 15, 1851 |
Taylor County |
John Adams, second President of the United States (1797–1801) |
&0000000000004482.0000004,482 |
&0000000000000424.000000424 sq mi
(&0000000000001098.0000001,098 km²) |
 |
| Allamakee County |
005 |
Waukon |
11 |
01847-02-20 February 20, 1847 |
Clayton County |
Allen Magee (a.k.a. Allan Makee), an early Indian trader |
&0000000000014675.00000014,675 |
&0000000000000640.000000640 sq mi
(&0000000000001658.0000001,658 km²) |
 |
| Appanoose County |
007 |
Centerville |
96 |
01843-02-17 February 17, 1843 |
Davis County |
Appanoose, Native American chief who headed peace party in the Black Hawk War |
&0000000000013721.00000013,721 |
&0000000000000496.000000496 sq mi
(&0000000000001285.0000001,285 km²) |
 |
| Audubon County |
009 |
Audubon |
57 |
01851-01-15 January 15, 1851 |
Black Hawk County and Cass County |
John James Audubon (1785–1851), ornithologist and artist |
&0000000000006830.0000006,830 |
&0000000000000443.000000443 sq mi
(&0000000000001147.0000001,147 km²) |
 |
| Benton County |
011 |
Vinton |
51 |
01837-12-21 December 21, 1837 |
Native American lands and Wisconsin Territory |
Thomas Hart Benton, United States Senator (1821–1851) |
&0000000000025308.00000025,308 |
&0000000000000716.000000716 sq mi
(&0000000000001854.0000001,854 km²) |
 |
| Black Hawk County |
013 |
Waterloo |
39 |
01843-02-17 February 17, 1843 |
Delaware County |
Black Hawk (1767–1838), chief of Fox and Sac Indians and leader in the Black Hawk War |
&0000000000128012.000000128,012 |
&0000000000000567.000000567 sq mi
(&0000000000001469.0000001,469 km²) |
 |
| Boone County |
015 |
Boone |
47 |
01846-01-13 January 13, 1846 |
Polk County |
Nathan Boone (1781–1863), one of the first to survey Iowa |
&0000000000026224.00000026,224 |
&0000000000000572.000000572 sq mi
(&0000000000001481.0000001,481 km²) |
 |
| Bremer County |
017 |
Waverly |
30 |
01851-01-15 January 15, 1851 |
Native American lands and Winnebago County |
Fredrika Bremer (1801–1865), Swedish poet and author |
&0000000000023325.00000023,325 |
&0000000000000428.000000428 sq mi
(&0000000000001109.0000001,109 km²) |
 |
| Buchanan County |
019 |
Independence |
40 |
01837-12-21 December 21, 1837 |
Delaware County and Wisconsin Territory |
James Buchanan, fifteenth President of the United States (1857–1861) |
&0000000000021093.00000021,093 |
&0000000000000571.000000571 sq mi
(&0000000000001479.0000001,479 km²) |
 |
| Buena Vista County |
021 |
Storm Lake |
24 |
01851-01-15 January 15, 1851 |
Clay County and Sac County |
Battle of Buena Vista, a battle during the Mexican-American War |
&0000000000020411.00000020,411 |
&0000000000000575.000000575 sq mi
(&0000000000001489.0000001,489 km²) |
 |
| Butler County |
023 |
Allison |
29 |
01851-01-15 January 15, 1851 |
Black Hawk County and Buchanan County |
William Orlando Butler (1791–1880), unsuccessful Democratic candidate for Vice President |
&0000000000015305.00000015,305 |
&0000000000000580.000000580 sq mi
(&0000000000001502.0000001,502 km²) |
 |
| Calhoun County |
025 |
Rockwell City |
34 |
01851-01-15 January 15, 1851 |
Fox County (renamed) |
John Caldwell Calhoun, Vice President of the United States (1825–1832) |
&0000000000011115.00000011,115 |
&0000000000000570.000000570 sq mi
(&0000000000001476.0000001,476 km²) |
 |
| Carroll County |
027 |
Carroll |
45 |
01851-01-15 January 15, 1851 |
Guthrie County |
Charles Carroll (1737–1832), longest lived signatory of the Declaration of Independence |
&0000000000021421.00000021,421 |
&0000000000000569.000000569 sq mi
(&0000000000001474.0000001,474 km²) |
 |
| Cass County |
029 |
Atlantic |
68 |
01851-01-15 January 15, 1851 |
Pottawattamie County |
Lewis Cass, United States Senator from Michigan and unsuccessful candidate for President (1848) |
&0000000000014684.00000014,684 |
&0000000000000564.000000564 sq mi
(&0000000000001461.0000001,461 km²) |
 |
| Cedar County |
031 |
Tipton |
65 |
01837-12-21 December 21, 1837 |
Wisconsin Territory |
Red Cedar River, river which runs through county |
&0000000000018187.00000018,187 |
&0000000000000580.000000580 sq mi
(&0000000000001502.0000001,502 km²) |
 |
| Cerro Gordo County |
033 |
Mason City |
17 |
01851-01-15 January 15, 1851 |
Floyd County |
Battle of Cerro Gordo, battle during the Mexican-American War |
&0000000000046447.00000046,447 |
&0000000000000568.000000568 sq mi
(&0000000000001471.0000001,471 km²) |
 |
| Cherokee County |
035 |
Cherokee |
23 |
01851-01-15 January 15, 1851 |
Crawford County |
Cherokee Native American tribe |
&0000000000013035.00000013,035 |
&0000000000000577.000000577 sq mi
(&0000000000001494.0000001,494 km²) |
 |
| Chickasaw County |
037 |
New Hampton |
19 |
01851-01-15 January 15, 1851 |
Fayette County |
Chickasaw Native American tribe |
&0000000000013095.00000013,095 |
&0000000000000505.000000505 sq mi
(&0000000000001308.0000001,308 km²) |
 |
| Clarke County |
039 |
Osceola |
83 |
01846-01-13 January 13, 1846 |
Lucas County |
James Clarke, third Governor of Iowa Territory (1845–1846) |
&0000000000009133.0000009,133 |
&0000000000000431.000000431 sq mi
(&0000000000001116.0000001,116 km²) |
 |
| Clay County |
041 |
Spencer |
14 |
01851-01-15 January 15, 1851 |
Native American lands |
Henry Clay, Jr. (1807–1847), officer in the Mexican-American War |
&0000000000017372.00000017,372 |
&0000000000000569.000000569 sq mi
(&0000000000001474.0000001,474 km²) |
 |
| Clayton County |
043 |
Elkader |
21 |
01837-12-21 December 21, 1837 |
Dubuque County and Wisconsin Territory |
John M. Clayton (1796–1856), United States Senator from Delaware |
&0000000000018678.00000018,678 |
&0000000000000779.000000779 sq mi
(&0000000000002018.0000002,018 km²) |
 |
| Clinton County |
045 |
Clinton |
66 |
01837-12-21 December 21, 1837 |
Dubuque County and Wisconsin Territory |
DeWitt Clinton (1769–1828), Governor of New York |
&0000000000050149.00000050,149 |
&0000000000000695.000000695 sq mi
(&0000000000001800.0000001,800 km²) |
 |
| Crawford County |
047 |
Denison |
44 |
01851-01-15 January 15, 1851 |
Shelby County |
William Harris Crawford (1772–1834), United States Senator from Georgia |
&0000000000016942.00000016,942 |
&0000000000000714.000000714 sq mi
(&0000000000001849.0000001,849 km²) |
 |
| Dallas County |
049 |
Adel |
59 |
01846-01-13 January 13, 1846 |
Polk County |
George Mifflin Dallas (1792–1864), eleventh Vice President of the United States |
&0000000000040750.00000040,750 |
&0000000000000586.000000586 sq mi
(&0000000000001518.0000001,518 km²) |
 |
| Davis County |
051 |
Bloomfield |
97 |
01843-02-17 February 17, 1843 |
Van Buren County |
Garrett Davis (1801–1872), congressman |
&0000000000008541.0000008,541 |
&0000000000000503.000000503 sq mi
(&0000000000001303.0000001,303 km²) |
 |
| Decatur County |
053 |
Leon |
94 |
01846-01-13 January 13, 1846 |
Appanoose County |
Stephen Decatur (1779–1820), naval officer in the War of 1812 |
&0000000000008689.0000008,689 |
&0000000000000532.000000532 sq mi
(&0000000000001378.0000001,378 km²) |
 |
| Delaware County |
055 |
Manchester |
41 |
01837-12-21 December 21, 1837 |
Dubuque County and Wisconsin Territory |
Delaware, United States state, or Delaware County, New York |
&0000000000018404.00000018,404 |
&0000000000000578.000000578 sq mi
(&0000000000001497.0000001,497 km²) |
 |
| Des Moines County |
057 |
Burlington |
89 |
01834-09-06 September 6, 1834 |
Michigan Territory and Wisconsin Territory |
Des Moines River, river that once ran through the county |
&0000000000042351.00000042,351 |
&0000000000000416.000000416 sq mi
(&0000000000001077.0000001,077 km²) |
 |
| Dickinson County |
059 |
Spirit Lake |
3 |
01851-01-15 January 15, 1851 |
Kossuth County |
Daniel Stevens Dickinson (1800–1866), United States Senator from New York |
&0000000000016424.00000016,424 |
&0000000000000381.000000381 sq mi
(&0000000000000987.000000987 km²) |
 |
| Dubuque County |
061 |
Dubuque |
42 |
01834-09-06 September 6, 1834 |
Michigan Territory and Wisconsin Territory |
Julien Dubuque (1762–1810), first permanent white settler in Iowa |
&0000000000089143.00000089,143 |
&0000000000000608.000000608 sq mi
(&0000000000001575.0000001,575 km²) |
 |
| Emmet County |
063 |
Estherville |
4 |
01851-01-15 January 15, 1851 |
Dickinson County and Kossuth County |
Robert Emmet (1778–1803), Irish revolutionary |
&0000000000011027.00000011,027 |
&0000000000000396.000000396 sq mi
(&0000000000001026.0000001,026 km²) |
 |
| Fayette County |
065 |
West Union |
20 |
01837-12-21 December 21, 1837 |
Clayton County and Wisconsin Territory |
Marquis de Lafayette (1757–1834), Frenchman who helped the American Colonies in the Revolutionary War |
&0000000000022008.00000022,008 |
&0000000000000731.000000731 sq mi
(&0000000000001893.0000001,893 km²) |
 |
| Floyd County |
067 |
Charles City |
18 |
01851-01-15 January 15, 1851 |
Chickasaw County |
Charles Floyd (1782–1804), member of the Lewis and Clark Expedition who died in Iowa |
&0000000000016900.00000016,900 |
&0000000000000501.000000501 sq mi
(&0000000000001298.0000001,298 km²) |
 |
| Franklin County |
069 |
Hampton |
28 |
01851-01-15 January 15, 1851 |
Chickasaw County |
Benjamin Franklin (1706–1790), statesman |
&0000000000010704.00000010,704 |
&0000000000000582.000000582 sq mi
(&0000000000001507.0000001,507 km²) |
 |
| Fremont County |
071 |
Sidney |
90 |
01847-02-24 February 24, 1847 |
Pottawattamie County |
John Charles Fremont (1813–1890), officer in Mexican-American War |
&0000000000008010.0000008,010 |
&0000000000000511.000000511 sq mi
(&0000000000001323.0000001,323 km²) |
 |
| Greene County |
073 |
Jefferson |
46 |
01851-01-15 January 15, 1851 |
Dallas County |
Nathanael Greene (1742–1786), Revolutionary War general |
&0000000000010366.00000010,366 |
&0000000000000568.000000568 sq mi
(&0000000000001471.0000001,471 km²) |
 |
| Grundy County |
075 |
Grundy Center |
38 |
01851-01-15 January 15, 1851 |
Black Hawk County |
Felix Grundy (1777–1840), United States Senator |
&0000000000012369.00000012,369 |
&0000000000000503.000000503 sq mi
(&0000000000001303.0000001,303 km²) |
 |
| Guthrie County |
077 |
Guthrie Center |
58 |
01851-07-08 July 8, 1851 |
Jackson County |
Edwin B. Guthrie, officer in Mexican-American War |
&0000000000011353.00000011,353 |
&0000000000000591.000000591 sq mi
(&0000000000001531.0000001,531 km²) |
 |
| Hamilton County |
079 |
Webster City |
36 |
01856-12-22 December 22, 1856 |
Webster County |
William W. Hamilton, President of the Iowa Senate (1856–1857) |
&0000000000016438.00000016,438 |
&0000000000000577.000000577 sq mi
(&0000000000001494.0000001,494 km²) |
 |
| Hancock County |
081 |
Garner |
16 |
01851-01-15 January 15, 1851 |
Wright County |
John Hancock (1737–1793), President of the First Continental Congress |
&0000000000012100.00000012,100 |
&0000000000000571.000000571 sq mi
(&0000000000001479.0000001,479 km²) |
 |
| Hardin County |
083 |
Eldora |
37 |
01851-01-15 January 15, 1851 |
Black Hawk County |
John J. Hardin (1810–1847), prominent soldier in the Black Hawk War |
&0000000000018812.00000018,812 |
&0000000000000569.000000569 sq mi
(&0000000000001474.0000001,474 km²) |
 |
| Harrison County |
085 |
Logan |
55 |
01851-01-15 January 15, 1851 |
Pottawattamie County |
William Henry Harrison (1773–1841), ninth President of the United States |
&0000000000015666.00000015,666 |
&0000000000000697.000000697 sq mi
(&0000000000001805.0000001,805 km²) |
 |
| Henry County |
087 |
Mount Pleasant |
88 |
01836-12-07 December 7, 1836 |
Wisconsin Territory |
Either[11] Henry Dodge (1782–1867), governor of Wisconsin Territory; or James Dougherty Henry, general in the Black Hawk War |
&0000000000020336.00000020,336 |
&0000000000000434.000000434 sq mi
(&0000000000001124.0000001,124 km²) |
 |
| Howard County |
089 |
Cresco |
9 |
01851-01-15 January 15, 1851 |
Chickasaw County |
Tilghman Ashurst Howard (1797–1844), congressman |
&0000000000009932.0000009,932 |
&0000000000000473.000000473 sq mi
(&0000000000001225.0000001,225 km²) |
 |
| Humboldt County |
091 |
Dakota City |
26 |
01857-02-26 February 26, 1857 |
Webster County |
Alexander von Humboldt (1769–1859), German scientist |
&0000000000010381.00000010,381 |
&0000000000000434.000000434 sq mi
(&0000000000001124.0000001,124 km²) |
 |
| Ida County |
093 |
Ida Grove |
32 |
01851-01-15 January 15, 1851 |
Cherokee County |
Mount Ida in Greece or the woman's name Ida |
&0000000000007837.0000007,837 |
&0000000000000432.000000432 sq mi
(&0000000000001119.0000001,119 km²) |
 |
| Iowa County |
095 |
Marengo |
63 |
01843-02-17 February 17, 1843 |
Washington County |
Iowa River, river that flows through the county, or Ioway Native American tribe |
&0000000000015671.00000015,671 |
&0000000000000586.000000586 sq mi
(&0000000000001518.0000001,518 km²) |
 |
| Jackson County |
097 |
Maquoketa |
54 |
01837-12-21 December 21, 1837 |
Wisconsin Territory |
Andrew Jackson (1767–1845), seventh President of the United States |
&0000000000020296.00000020,296 |
&0000000000000636.000000636 sq mi
(&0000000000001647.0000001,647 km²) |
 |
| Jasper County |
099 |
Newton |
61 |
01846-01-13 January 13, 1846 |
Mahaska County |
William Jasper (1750–1779), sergeant in the Revolutionary War |
&0000000000037213.00000037,213 |
&0000000000000730.000000730 sq mi
(&0000000000001891.0000001,891 km²) |
 |
| Jefferson County |
101 |
Fairfield |
87 |
01839-01-21 January 21, 1839 |
Native American lands |
Thomas Jefferson (1743–1826), third President of the United States |
&0000000000016181.00000016,181 |
&0000000000000435.000000435 sq mi
(&0000000000001127.0000001,127 km²) |
 |
| Johnson County |
103 |
Iowa City |
64 |
01837-12-21 December 21, 1837 |
Des Moines County, Iowa and Wisconsin Territory |
Richard Mentor Johnson (1780–1850), Vice President of the United States 1837-1841 |
&0000000000111006.000000111,006 |
&0000000000000614.000000614 sq mi
(&0000000000001590.0000001,590 km²) |
 |
| Jones County |
105 |
Anamosa |
53 |
01837-12-21 December 21, 1837 |
Wisconsin Territory |
George Wallace Jones (1804–1896), United States Senator from Iowa |
&0000000000020221.00000020,221 |
&0000000000000575.000000575 sq mi
(&0000000000001489.0000001,489 km²) |
 |
| Keokuk County |
107 |
Sigourney |
74 |
01837-12-21 December 21, 1837 |
Washington County |
Keokuk (1767–1848), chief of the Sac Native American tribe |
&0000000000011400.00000011,400 |
&0000000000000579.000000579 sq mi
(&0000000000001500.0000001,500 km²) |
 |
| Kossuth County |
109 |
Algona |
5 |
01851-01-15 January 15, 1851 |
Webster County |
Lajos Kossuth (1802–1894), Hungarian patriot |
&0000000000017163.00000017,163 |
&0000000000000973.000000973 sq mi
(&0000000000002520.0000002,520 km²) |
 |
| Lee County |
111 |
Fort Madison and Keokuk |
99 |
01836-12-07 December 7, 1836 |
Des Moines County |
William Elliott Lee, businessman; or Robert E. Lee (1807–1870), Confederate general |
&0000000000038052.00000038,052 |
&0000000000000517.000000517 sq mi
(&0000000000001339.0000001,339 km²) |
 |
| Linn County |
113 |
Cedar Rapids |
52 |
01837-12-21 December 21, 1837 |
Wisconsin Territory |
Lewis Fields Linn (1795–1843), doctor and United States Senator from Missouri |
&0000000000191701.000000191,701 |
&0000000000000718.000000718 sq mi
(&0000000000001860.0000001,860 km²) |
 |
| Louisa County |
115 |
Wapello |
76 |
01836-12-07 December 7, 1836 |
Des Moines County |
Either[12] Louisa Massey, a woman who avenged the death of her brother; or Louisa County, Virginia |
&0000000000012183.00000012,183 |
&0000000000000402.000000402 sq mi
(&0000000000001041.0000001,041 km²) |
 |
| Lucas County |
117 |
Chariton |
84 |
01846-01-13 January 13, 1846 |
Monroe County |
Robert Lucas (1781–1853), first Governor of Iowa Territory |
&0000000000009422.0000009,422 |
&0000000000000431.000000431 sq mi
(&0000000000001116.0000001,116 km²) |
 |
| Lyon County |
119 |
Rock Rapids |
1 |
01851-01-15 January 15, 1851 |
Woodbury County, Iowa |
Nathaniel Lyon (1818–1861), first Union general to be killed in the American Civil War, (formerly named Buncombe County) |
&0000000000011763.00000011,763 |
&0000000000000588.000000588 sq mi
(&0000000000001523.0000001,523 km²) |
 |
| Madison County |
121 |
Winterset |
70 |
01846-01-13 January 13, 1846 |
Polk County |
James Madison (1751–1836), fourth President of the United States |
&0000000000014019.00000014,019 |
&0000000000000561.000000561 sq mi
(&0000000000001453.0000001,453 km²) |
 |
| Mahaska County |
123 |
Oskaloosa |
73 |
01843-02-17 February 17, 1843 |
Fox and Sac Indian lands |
Mahaska (1784–1834), chief of the Ioway Native American tribe |
&0000000000022335.00000022,335 |
&0000000000000571.000000571 sq mi
(&0000000000001479.0000001,479 km²) |
 |
| Marion County |
125 |
Knoxville |
72 |
01845-06-10 June 10, 1845 |
Washington County |
Francis Marion (1732–1795), general in the Revolutionary War |
&0000000000032052.00000032,052 |
&0000000000000554.000000554 sq mi
(&0000000000001435.0000001,435 km²) |
 |
| Marshall County |
127 |
Marshalltown |
49 |
01846-01-13 January 13, 1846 |
Jasper County |
John Marshall (1755–1835), fourth Chief Justice of the United States Supreme Court |
&0000000000039311.00000039,311 |
&0000000000000572.000000572 sq mi
(&0000000000001481.0000001,481 km²) |
 |
| Mills County |
129 |
Glenwood |
79 |
01851-01-15 January 15, 1851 |
Pottawattamie County |
Frederick Mills, major killed during the Battle of Churubusco in the Mexican-American War |
&0000000000014547.00000014,547 |
&0000000000000437.000000437 sq mi
(&0000000000001132.0000001,132 km²) |
 |
| Mitchell County |
131 |
Osage |
8 |
01851-01-15 January 15, 1851 |
Chickasaw County |
John Mitchel (1815–1875), Irish patriot |
&0000000000010874.00000010,874 |
&0000000000000469.000000469 sq mi
(&0000000000001215.0000001,215 km²) |
 |
| Monona County |
133 |
Onawa |
43 |
01851-01-15 January 15, 1851 |
Harrison County |
Word of Native American origin or Monona, Iowa |
&0000000000010020.00000010,020 |
&0000000000000693.000000693 sq mi
(&0000000000001795.0000001,795 km²) |
 |
| Monroe County |
135 |
Albia |
85 |
01843-02-17 February 17, 1843 |
Wapello County |
James Monroe (1758–1831), fifth President of the United States |
&0000000000008016.0000008,016 |
&0000000000000433.000000433 sq mi
(&0000000000001121.0000001,121 km²) |
 |
| Montgomery County |
137 |
Red Oak |
80 |
01851-01-15 January 15, 1851 |
Polk County |
Richard Montgomery (1738–1775), general in the Revolutionary War |
&0000000000011771.00000011,771 |
&0000000000000424.000000424 sq mi
(&0000000000001098.0000001,098 km²) |
 |
| Muscatine County |
139 |
Muscatine |
77 |
01836-12-07 December 7, 1836 |
Des Moines County |
Muscatine Native American tribe; or Muscatine Island in the Mississippi River |
&0000000000041722.00000041,722 |
&0000000000000439.000000439 sq mi
(&0000000000001137.0000001,137 km²) |
 |
| O'Brien County |
141 |
Primghar |
13 |
01851-01-15 January 15, 1851 |
Cherokee County |
William Smith O'Brien (1803–1864), Irish revolutionary |
&0000000000015102.00000015,102 |
&0000000000000573.000000573 sq mi
(&0000000000001484.0000001,484 km²) |
 |
| Osceola County |
143 |
Sibley |
2 |
01851-01-15 January 15, 1851 |
Woodbury County |
Osceola (1804–1838), Native American leader |
&0000000000007003.0000007,003 |
&0000000000000399.000000399 sq mi
(&0000000000001033.0000001,033 km²) |
 |
| Page County |
145 |
Clarinda |
91 |
01847-02-24 February 24, 1847 |
Pottawattamie County |
John Page, officer killed in Battle of Palo Alto in the Mexican-American War |
&0000000000016976.00000016,976 |
&0000000000000535.000000535 sq mi
(&0000000000001386.0000001,386 km²) |
 |
| Palo Alto County |
147 |
Emmetsburg |
15 |
01851-01-15 January 15, 1851 |
Kossuth County |
Battle of Palo Alto in the Mexican-American War |
&0000000000010147.00000010,147 |
&0000000000000564.000000564 sq mi
(&0000000000001461.0000001,461 km²) |
 |
| Plymouth County |
149 |
Le Mars |
22 |
01851-01-15 January 15, 1851 |
Woodbury County |
Landing place of the Pilgrims who came to America on the Mayflower |
&0000000000024849.00000024,849 |
&0000000000000864.000000864 sq mi
(&0000000000002238.0000002,238 km²) |
 |
| Pocahontas County |
151 |
Pocahontas |
25 |
01851-01-15 January 15, 1851 |
Greene County and Humboldt County |
Pocahantas (1595–1618), famous Native American woman |
&0000000000008662.0000008,662 |
&0000000000000578.000000578 sq mi
(&0000000000001497.0000001,497 km²) |
 |
| Polk County |
153 |
Des Moines |
60 |
01846-01-13 January 13, 1846 |
Native American lands |
James K. Polk (1795–1849), eleventh President of the United States |
&0000000000374601.000000374,601 |
&0000000000000570.000000570 sq mi
(&0000000000001476.0000001,476 km²) |
 |
| Pottawattamie County |
155 |
Council Bluffs |
67 |
01847-02-24 February 24, 1847 |
Native American lands |
Pottawattamie Native American tribe |
&0000000000087704.00000087,704 |
&0000000000000954.000000954 sq mi
(&0000000000002471.0000002,471 km²) |
 |
| Poweshiek County |
157 |
Montezuma |
62 |
01843-02-17 February 17, 1843 |
Mesquakie Indian lands |
Poweshiek, chief of the Fox tribe |
&0000000000018815.00000018,815 |
&0000000000000585.000000585 sq mi
(&0000000000001515.0000001,515 km²) |
 |
| Ringgold County |
159 |
Mount Ayr |
93 |
01847-02-24 February 24, 1847 |
Taylor County |
Samuel Ringgold (1796–1846), major killed in the Mexican-American War |
&0000000000005469.0000005,469 |
&0000000000000538.000000538 sq mi
(&0000000000001393.0000001,393 km²) |
 |
| Sac County |
161 |
Sac City |
33 |
01851-01-15 January 15, 1851 |
Greene County |
Sac Native American tribe |
&0000000000011529.00000011,529 |
&0000000000000576.000000576 sq mi
(&0000000000001492.0000001,492 km²) |
 |
| Scott County |
163 |
Davenport |
78 |
01837-12-21 December 21, 1837 |
Wisconsin Territory |
Winfield Scott (1786–1866), U.S. Army General during the War of 1812 |
&0000000000158668.000000158,668 |
&0000000000000458.000000458 sq mi
(&0000000000001186.0000001,186 km²) |
 |
| Shelby County |
165 |
Harlan |
56 |
01851-01-15 January 15, 1851 |
Cass County |
Isaac Shelby (1750–1826), general in the Revolutionary War and the War of 1812 |
&0000000000013173.00000013,173 |
&0000000000000591.000000591 sq mi
(&0000000000001531.0000001,531 km²) |
 |
| Sioux County |
167 |
Orange City |
12 |
01851-01-15 January 15, 1851 |
Plymouth County |
Sioux Native American tribe |
&0000000000031589.00000031,589 |
&0000000000000768.000000768 sq mi
(&0000000000001989.0000001,989 km²) |
 |
| Story County |
169 |
Nevada |
48 |
01846-01-13 January 13, 1846 |
Boone County, Jasper County, and Polk County |
Joseph Story (1779–1845), United States Supreme Court justice |
&0000000000079981.00000079,981 |
&0000000000000573.000000573 sq mi
(&0000000000001484.0000001,484 km²) |
 |
| Tama County |
171 |
Toledo |
50 |
01843-02-17 February 17, 1843 |
Benton County and Boone County |
Either[13] Taimah, Fox chief; or Taomah, wife of Poweshiek; or Potama, Native American chief |
&0000000000018103.00000018,103 |
&0000000000000721.000000721 sq mi
(&0000000000001867.0000001,867 km²) |
|
