List of counties in Missouri

There are 114 counties and one independent city in the U.S. State of Missouri. Following the Louisiana Purchase and the admittance of Louisiana into the United States in 1812, five counties were formed out of the Missouri Territory at the first general assembly: Cape Girardeau, New Madrid, Saint Charles, Saint Louis, and Ste. Genevieve. Most subsequent counties were apportioned from these five original counties. Six more counties were added through the 1836 Platte Purchase, the acquired lands of which formed the northwest tip of the state and consisted of Andrew, Atchison, Buchanan, Holt, Nodaway, and Platte counties.[1]

Independent city and Counties of Missouri
LocationState of Missouri
Number114 counties
1 independent city
Populations1,983 (Worth) – 997,187 (St. Louis)
Areas266 square miles (690 km2) (Worth) – 1,179 square miles (3,050 km2) (Texas)
Government
Subdivisions

In Missouri, the county level of government comes between those of the city and the state. Its primary responsibilities include maintaining roads, providing security, prosecuting criminals, and collecting taxes. Elected officials at this level include a sheriff, prosecuting attorney, and assessor.[2]

Most of the counties in Missouri are named after politicians. One such county, Cass, was originally named Van Buren County after President Martin Van Buren, and was changed to its present name in support of Van Buren's Democratic opponent Lewis Cass during the presidential election of 1848. Other counties are named after war heroes, natural resources, explorers, and former U.S. territories.[3]

The city of St. Louis is an independent city, and is not within the limits of a county. Its residents voted to secede from St. Louis County in 1876. Throughout the United States, St. Louis is one of three independent cities outside the state of Virginia (the other two are Baltimore, Maryland and Carson City, Nevada).[4]

Population figures are based on the 2021 Census estimate. According to that census estimate, the population of Missouri is 6,168,187, an increase of 0.2% from 2020. The average population of Missouri's counties is 53,636; St. Louis County is the most populous (997,187), and Worth County is the least (1,983). The average land area is 599 sq mi (1,550 km2). The largest county is Texas County (1,179 sq mi, 3,054 km2) and the smallest is St. Louis city (61.9 sq mi, 160 km2).[5][6]

The Federal Information Processing Standard (FIPS) is used by the U.S. government to uniquely identify counties, and is provided for each entry. These codes link to the United States Census Bureau's "quick facts" for each county. To distinguish from counties in other states, one must use Missouri's FIPS code, 29. For example, Adair County's unique nationwide identifier is 29001.[7]

Counties
County
 FIPS code[7] County seat[8] Est.[8] Formed from[3] Etymology[3][9][10] Population[6] Area[8] Map
Adair County 001 Kirksville1841Macon CountyJohn Adair (1757–1840), pioneer, soldier, and seventh Governor of Kentucky 25,185 568 sq mi
(1,471 km2)
Andrew County 003 Savannah1841Part of the Platte PurchaseAndrew Jackson Davis , a prominent citizen of St. Louis 18,002 435 sq mi
(1,127 km2)
Atchison County 005 Rock Port1843Holt County, part of the Platte PurchaseU.S. Senator David Rice Atchison (1807–1886), a Democrat from Missouri 5,234 545 sq mi
(1,412 km2)
Audrain County 007 Mexico1831Callaway, Monroe and Ralls countiesJames H. Audrain, a War of 1812 colonel Missouri State Legislator 24,982 693 sq mi
(1,795 km2)
Barry County 009 Cassville1835Greene CountyWilliam Taylor Barry (1784–1835), jurist and United States Postmaster General 34,712 779 sq mi
(2,018 km2)
Barton County 011 Lamar1855Jasper CountyU.S. Senator David Barton (1783–1837), one of the first senators from Missouri 11,658 594 sq mi
(1,538 km2)
Bates County 013 Butler1841Van Buren (now Cass) CountyFrederick Bates (1777–1825), the second governor of Missouri 16,105 848 sq mi
(2,196 km2)
Benton County 015 Warsaw1835Pettis and Greene countiesThomas Hart Benton (1782–1858), U.S. Senator from Missouri 19,908 706 sq mi
(1,829 km2)
Bollinger County 017 Marble Hill1851Cape Girardeau, Madison, Stoddard and Wayne countiesGeorge Frederick Bollinger (1770–1842), early settler of Missouri 10,556 621 sq mi
(1,608 km2)
Boone County 019 Columbia1820Howard CountyDaniel Boone (1734–1820), American pioneer and hunter 185,840 685 sq mi
(1,774 km2)
Buchanan County 021 Saint Joseph1838Part of the Platte PurchaseJames Buchanan (1791–1868), 15th President of the United States 83,853 410 sq mi
(1,062 km2)
Butler County 023 Poplar Bluff1849Wayne CountyWilliam O. Butler (1791–1880), U.S. Representative from Kentucky and vice-presidential nominee under Lewis Cass 42,101 698 sq mi
(1,808 km2)
Caldwell County 025 Kingston1836Ray CountyDisputed; either John Caldwell, an Indian scout and friend of respected Colonel Alexander William Doniphan; John Caldwell, Lieutenant Governor of Kentucky; or Mathew Caldwell, a signer of the Texas Declaration of Independence 8,897 429 sq mi
(1,111 km2)
Callaway County 027 Fulton1821Boone, Howard and Montgomery countiesJames Callaway (1783–1815), soldier during the War of 1812 and grandson of Daniel Boone 44,638 839 sq mi
(2,173 km2)
Camden County 029 Camdenton1841Benton, Morgan and Pulaski countiesCharles Pratt, 1st Earl Camden (1714–1794), an English lawyer, judge, Whig politician, and proponent of civil liberties 43,436 655 sq mi
(1,696 km2)
Cape Girardeau County 031 Jackson1812One of the five original countiesA rock promontory over the Mississippi River and Ensign Sieur Jean Baptiste de Girardot, a French officer and early explorer of the region 82,113 579 sq mi
(1,500 km2)
Carroll County 033 Carrollton1833Ray CountyCharles Carroll (1737–1832), delegate to the Continental Congress and U.S. Senator for Maryland 8,376 695 sq mi
(1,800 km2)
Carter County 035 Van Buren1859Oregon, Reynolds, Ripley and Shannon countiesZimri Carter (1794-1872), a pioneering settler 5,320 508 sq mi
(1,316 km2)
Cass County 037 Harrisonville1833Jackson CountyLewis Cass (1782–1866), senator from Michigan 109,638 699 sq mi
(1,810 km2)
Cedar County 039 Stockton1845Dade and St. Clair countiesNamed for the abundance of Eastern Red Cedar trees 14,496 476 sq mi
(1,233 km2)
Chariton County 041 Keytesville1821Howard CountyChariton River, a tributary of the Missouri River, whose naming origin is disputed 7,356 756 sq mi
(1,958 km2)
Christian County 043 Ozark1859Greene, Taney and Webster countiesWilliam Christian (1743–1786), colonel in the American Revolution 91,499 563 sq mi
(1,458 km2)
Clark County 045 Kahoka1836Lewis CountyWilliam Clark (1770–1838), American explorer, soldier, Indian agent, and territorial governor 6,736 507 sq mi
(1,313 km2)
Clay County 047 Liberty1822Ray CountyHenry Clay (1777–1852), American Senator and orator from Kentucky 255,518 396 sq mi
(1,026 km2)
Clinton County 049 Plattsburg1833Clay CountyGeorge Clinton (1739–1812), soldier and Governor of New York, considered one of the Founding Fathers of the United States 21,287 419 sq mi
(1,085 km2)
Cole County 051 Jefferson City1820Cooper CountyStephen Cole, pioneering settler 77,205 392 sq mi
(1,015 km2)
Cooper County 053 Boonville1818Howard CountySarshel Benjamin Cooper, pioneering settler 17,115 565 sq mi
(1,463 km2)
Crawford County 055 Steelville1829Gasconade CountyWilliam H. Crawford (1772–1834), U.S. Senator from Georgia, U.S. Secretary of Treasury, and judge 22,807 743 sq mi
(1,924 km2)
Dade County 057 Greenfield1841Barry and Polk countiesMajor Francis L. Dade (1793?–1835), Major in the U.S. 4th Infantry Regiment, United States Army, during the Second Seminole War 7,599 490 sq mi
(1,269 km2)
Dallas County 059 Buffalo1841Polk CountyGeorge M. Dallas (1792–1864), U.S. Vice President under James K. Polk 17,341 542 sq mi
(1,404 km2)
Daviess County 061 Gallatin1836Ray CountyJoseph Hamilton Daveiss (1774–1811), commanded the Dragoons of the Indiana Militia at the Battle of Tippecanoe 8,399 567 sq mi
(1,469 km2)
DeKalb County 063 Maysville1843Clinton CountyJohann de Kalb (1721–1780), a German soldier who served as a major general in the Continental Army during the American Revolutionary War 11,098 424 sq mi
(1,098 km2)
Dent County 065 Salem1851Crawford and Shannon countiesJames Dent, pioneering settler 14,432 754 sq mi
(1,953 km2)
Douglas County 067 Ava1857Ozark CountyStephen A. Douglas (1813–1861), American Senator from Illinois, and the Democratic nominee for President in 1860 11,732 815 sq mi
(2,111 km2)
Dunklin County 069 Kennett1843Stoddard CountyDaniel Dunklin (1790–1844), fifth governor of Missouri 27,717 546 sq mi
(1,414 km2)
Franklin County 071 Union1818St. Louis CountyBenjamin Franklin (1706–1790), writer, publisher, orator, and one of the Founding Fathers of the United States 105,231 922 sq mi
(2,388 km2)
Gasconade County 073 Hermann1821Franklin CountyGasconade River, a tributary of the Missouri River; the river probably derives its name from the French word "gascon" which means braggart, and could be an old satirical name describing those who boast about their adventures upon return to St. Louis 14,791 520 sq mi
(1,347 km2)
Gentry County 075 Albany1841Clinton CountyRichard Gentry (1788–1837), a distinguished American military colonel in the Seminole Wars 6,173 492 sq mi
(1,274 km2)
Greene County 077 Springfield1833Crawford and Wayne countiesNathanael Greene (1742–1786), a major general of the Continental Army in the American Revolutionary War 300,865 675 sq mi
(1,748 km2)
Grundy County 079 Trenton1839Livingston CountyFelix Grundy (1777–1840), U.S. Congressman and U.S. Senator from Tennessee who also served as the 13th Attorney General of the United States 9,720 436 sq mi
(1,129 km2)
Harrison County 081 Bethany1843Daviess CountyAlbert G. Harrison (1800–1839), U.S. Representative from Missouri 8,164 725 sq mi
(1,878 km2)
Henry County 083 Clinton1834Lillard (now Lafayette) CountyPatrick Henry (1736–1799), first post-colonial Governor of Virginia and prominent figure in the American Revolution 22,206 702 sq mi
(1,818 km2)
Hickory County 085 Hermitage1845Benton and Polk countiesAndrew Jackson (1767–1845), seventh U.S. President, who was nicknamed "Old Hickory" during his military service 8,607 399 sq mi
(1,033 km2)
Holt County 087 Oregon1841Part of the Platte PurchaseDavid Rice Holt, Missouri State Representative 4,226 462 sq mi
(1,197 km2)
Howard County 089 Fayette1816St. Charles and St. Louis countiesBenjamin Howard (1760–1814), a Congressman from Kentucky, governor of Missouri Territory and a brigadier general in the War of 1812 10,168 466 sq mi
(1,207 km2)
Howell County 091 West Plains1857Oregon CountyDisputed – Josiah Howell, pioneering settler 39,975 928 sq mi
(2,404 km2)
Iron County 093 Ironton1857Madison, Reynolds, St. Francois, Washington and Wayne countiesThe abundance of iron ore in the area 9,408 551 sq mi
(1,427 km2)
Jackson County 095 Independence,
Kansas City		1826Lillard (now Lafayette) CountyAndrew Jackson (1767–1845), U.S. Senator from Tennessee and later 7th President of the United States from 1829 to 1837 716,862 605 sq mi
(1,567 km2)
Jasper County 097 Carthage1841Barry CountyWilliam Jasper (c. 1750–1779), a noted American soldier in the Revolutionary War 123,155 640 sq mi
(1,658 km2)
Jefferson County 099 Hillsboro1818St. Louis and Sainte Genevieve countiesThomas Jefferson (1743–1826), third President of the United States, principal author of the Declaration of Independence, and one of the most influential Founding Fathers 227,771 657 sq mi
(1,702 km2)
Johnson County 101 Warrensburg1834Lillard (now Lafayette) CountyRichard M. Johnson (1780–1850), ninth Vice President of the United States, serving in the administration of Martin Van Buren 54,150 831 sq mi
(2,152 km2)
Knox County 103 Edina1843Scotland CountyHenry Knox (1750–1806) an American bookseller from Boston who became the chief artillery officer of the Continental Army and later the nation's first Secretary of War 3,808 506 sq mi
(1,311 km2)
Laclede County 105 Lebanon1849Camden, Pulaski and Wright countiesPierre Laclede (1729–1778), founder of St. Louis, Missouri 36,133 766 sq mi
(1,984 km2)
Lafayette County 107 Lexington1821Cooper CountyGilbert du Motier, the Marquis de Lafayette (1757–1834), French military officer and general in the American Revolutionary War 32,817 629 sq mi
(1,629 km2)
Lawrence County 109 Mount Vernon1843Barry and Dade countiesJames Lawrence (1781–1813), an American naval officer best known for his last words "Don't give up the ship!" 38,321 613 sq mi
(1,588 km2)
Lewis County 111 Monticello1833Marion CountyMeriwether Lewis (1774–1809), explorer and governor of the Louisiana Territory 10,000 505 sq mi
(1,308 km2)
Lincoln County 113 Troy1818St. Charles CountyDisputed; either Lincoln County, Kentucky (birthplace of Christopher Clark, a Missouri legislator who advocated for the county's creation),[11] or for Benjamin Lincoln (1733–1810), an American revolutionary war general 61,586 630 sq mi
(1,632 km2)
Linn County 115 Linneus1837Chariton CountyLewis F. Linn (1796–1843), a Jacksonian Democratic U.S. Senator for Missouri 11,843 620 sq mi
(1,606 km2)
Livingston County 117 Chillicothe1837Carroll CountyEdward Livingston (1764–1836), a prominent American jurist and statesman, influential in the drafting of the Louisiana Civil Code of 1825, a civil code based largely on the Napoleonic Code 14,755 535 sq mi
(1,386 km2)
Macon County 121 Macon1837Chariton and Randolph countiesNathaniel Macon (1758–1837), member of the United States House of Representatives from 1791 to 1815 who briefly served in the American Revolutionary War 15,183 804 sq mi
(2,082 km2)
Madison County 123 Fredericktown1818Cape Girardeau and Sainte Genevieve countiesJames Madison (1751–1836), politician and political philosopher who served as the fourth President of the United States, and one of the Founding Fathers of the United States 12,652 497 sq mi
(1,287 km2)
Maries County 125 Vienna1855Osage and Pulaski countiesMaries River, possibly a corruption of the French word marais meaning "marsh" or "swamp" 8,406 528 sq mi
(1,368 km2)
Marion County 127 Palmyra1826Ralls CountyFrancis Marion (1732–1795), a military officer who served in the American Revolutionary War 28,518 438 sq mi
(1,134 km2)
McDonald County 119 Pineville1847Newton CountyAlexander McDonald, American Revolutionary War sergeant 23,383 540 sq mi
(1,399 km2)
Mercer County 129 Princeton1845Grundy CountyJohn F. Mercer (1759–1821), an American lawyer, planter, and Governor of Maryland 3,488 454 sq mi
(1,176 km2)
Miller County 131 Tuscumbia1837Cole and Pulaski countiesJohn Miller (1781–1846), an American publisher and politician from St. Louis, Missouri. He was the fourth Governor of Missouri and represented Missouri in the U.S. House 24,909 592 sq mi
(1,533 km2)
Mississippi County 133 Charleston1842Scott CountyMississippi River, the second-longest river in the United States which forms Missouri's eastern border 12,538 413 sq mi
(1,070 km2)
Moniteau County 135 California1845Cole and Morgan countiesMoniteau Creek; "moniteau" is a French spelling of manitou, the Algonquian Great Spirit 15,484 417 sq mi
(1,080 km2)
Monroe County 137 Paris1831Ralls CountyJames Monroe (1758–1831), fifth President of the United States who crafted the Missouri Compromise 8,712 646 sq mi
(1,673 km2)
Montgomery County 139 Montgomery City1818St. Charles CountyRichard Montgomery (1738–1775), an Irish-born soldier who first served in the British Army and later became a brigadier-general in the Continental Army during the Revolutionary War 11,415 539 sq mi
(1,396 km2)
Morgan County 141 Versailles1833Cooper CountyDaniel Morgan (c. 1736–1802), American pioneer, soldier, and United States Representative from Virginia 21,379 598 sq mi
(1,549 km2)
New Madrid County 143 New Madrid1812One of the five original countiesMadrid, Spain 16,035 678 sq mi
(1,756 km2)
Newton County 145 Neosho1838Barry CountyJohn Newton (1755–1780), legendary soldier of the American Revolution 59,386 626 sq mi
(1,621 km2)
Nodaway County 147 Maryville1843Andrew County, the Platte PurchaseNodaway River, a 120-mile (190 km) long river in southwest Iowa and northwest Missouri 21,160 877 sq mi
(2,271 km2)
Oregon County 149 Alton1841Ripley CountyOregon Territory 8,631 792 sq mi
(2,051 km2)
Osage County 151 Linn1841Gasconade CountyOsage River, a 360 miles (580 km) long tributary of the Missouri River in central Missouri; the name of the river is probably derived from a French corruption of "Washazhe" – the name of the Osage Native Americans 13,379 606 sq mi
(1,570 km2)
Ozark County 153 Gainesville1841Taney CountyOzark Mountains – Ozark is the anglicized form of the French "aux arcs", an abbreviation of "Aux Arkansas", which means in the county of Arkansas 8,782 747 sq mi
(1,935 km2)
Pemiscot County 155 Caruthersville1851New Madrid CountyAn American Indian word meaning "liquid mud" 15,236 493 sq mi
(1,277 km2)
Perry County 157 Perryville1821Sainte Genevieve CountyOliver Hazard Perry (1785–1819), naval officer in the War of 1812 against Britain, earned the title "Hero of Lake Erie" for leading American forces in a decisive naval victory at the Battle of Lake Erie 18,922 475 sq mi
(1,230 km2)
Pettis County 159 Sedalia1833Cooper and Saline countiesSpencer Darwin Pettis (1802–1831), U.S. Representative from Missouri 43,188 685 sq mi
(1,774 km2)
Phelps County 161 Rolla1857Crawford CountyJohn S. Phelps (1814–1886), a politician, soldier during the American Civil War, and twenty-third Governor of Missouri 44,937 673 sq mi
(1,743 km2)
Pike County 163 Bowling Green1818St. Charles CountyZebulon Pike (1778–1813), American soldier and explorer for whom Pikes Peak in Colorado is also named 17,761 673 sq mi
(1,743 km2)
Platte County 165 Platte City1838Part of the Platte PurchasePlatte River, a tributary of the Missouri River, which is in turn named for the French word "platte" meaning flat or shallow 108,569 420 sq mi
(1,088 km2)
Polk County 167 Bolivar1835Greene CountyJames K. Polk (1795–1849), 11th President of the United States 32,043 637 sq mi
(1,650 km2)
Pulaski County 169 Waynesville1833Crawford CountyKazimierz Pulaski (1745–1779), Polish soldier of fortune in the American Revolutionary War, he saved the life of George Washington and became a general in the Continental Army 53,816 547 sq mi
(1,417 km2)
Putnam County 171 Unionville1843Adair and Sullivan countiesIsrael Putnam (1718–1790), an American army general who fought with distinction at the Battle of Bunker Hill during the American Revolutionary War 4,712 518 sq mi
(1,342 km2)
Ralls County 173 New London1821Pike CountyDaniel Ralls, a Missouri State Representative 10,361 471 sq mi
(1,220 km2)
Randolph County 175 Huntsville1829Chariton and Ralls countiesJohn Randolph of Roanoke (1773–1833), a leader in Congress from Virginia and spokesman for the "Old Republican" 24,760 482 sq mi
(1,248 km2)
Ray County 177 Richmond1820Howard CountyJohn Ray, Missouri State Representative 23,008 570 sq mi
(1,476 km2)
Reynolds County 179 Centerville1845Shannon CountyThomas Reynolds (1796–1844), governor of Missouri from 1840 to 1844 6,087 811 sq mi
(2,100 km2)
Ripley County 181 Doniphan1831Wayne CountyEleazer Wheelock Ripley (1782–1839), Brigadier General in the War of 1812 10,617 630 sq mi
(1,632 km2)
Saint Charles County 183 Saint Charles1812One of the five original countiesSt. Charles Borromeo (1538–1584), an Italian saint and cardinal of the Roman Catholic Church 409,981 561 sq mi
(1,453 km2)
Saint Clair County 185 Osceola1841Rives (now Henry) CountyArthur St. Clair (1737–1818), an American soldier and Governor of the Northwest Territory 9,376 677 sq mi
(1,753 km2)
Saint Francois County 187 Farmington1821Jefferson, Ste. Genevieve and Washington countiesSt. Francis of Assisi (c. 1182–1226), a Catholic deacon and the founder of the Order of Friars Minor, more commonly known as the Franciscans 67,541 450 sq mi
(1,165 km2)
Saint Louis County 189 Clayton1812One of the five original countiesKing Louis IX (1214–1270), King of France from 1226 until his death 997,187 508 sq mi
(1,316 km2)
Saint Louis City 510 St. Louis1876Created in 1876 when city residents voted to secede from St. Louis CountyKing Louis IX (1214–1270), King of France from 1226 until his death 293,310 61.9 sq mi
(160 km2)
Sainte Genevieve County 186 Ste. Genevieve1812One of the five original countiesSt. Genevieve (c. 420 – c. 510), the patron saint of Paris in Roman Catholic and Eastern Orthodox tradition 18,588 502 sq mi
(1,300 km2)
Saline County 195 Marshall1820Cooper CountyLocal hot springs 23,289 756 sq mi
(1,958 km2)
Schuyler County 197 Lancaster1843Adair CountyPhilip Schuyler (1733–1804), a general in the American Revolution and a United States Senator from New York 4,025 308 sq mi
(798 km2)
Scotland County 199 Memphis1841Clark, Lewis, and Shelby countiesScotland (country) 4,693 438 sq mi
(1,134 km2)
Scott County 201 Benton1822New Madrid CountyJohn Guier Scott (1819–1892), a U.S. Representative from Missouri 37,840 421 sq mi
(1,090 km2)
Shannon County 203 Eminence1837Ripley CountyGeorge Shannon (1785–1836), member of the Lewis and Clark Expedition 7,106 1,004 sq mi
(2,600 km2)
Shelby County 205 Shelbyville1835Marion CountyIsaac Shelby (1750–1826), the first and fifth Governor of Kentucky 5,976 501 sq mi
(1,298 km2)
Stoddard County 207 Bloomfield1835New Madrid CountyAmos Stoddard (1762–1813), the only commandant of Upper Louisiana for the French Republic and the only commandant for the District of Louisiana for the United States in 1804 during the handover of the Louisiana Purchase 28,479 827 sq mi
(2,142 km2)
Stone County 209 Galena1851Taney CountyWilliam Stone, first elected judge of Taney County 31,548 463 sq mi
(1,199 km2)
Sullivan County 211 Milan1843Linn CountyJohn Sullivan (1740–1795), American Revolutionary War general 5,934 651 sq mi
(1,686 km2)
Taney County 213 Forsyth1837Greene CountyRoger Brooke Taney (1777–1864), eleventh United States Attorney General and fifth Chief Justice of the United States 56,387 632 sq mi
(1,637 km2)
Texas County 215 Houston1843Shannon and Wright countiesRepublic of Texas 24,987 1,179 sq mi
(3,054 km2)
Vernon County 217 Nevada1851Bates CountyMiles Vernon, Missouri State Senator – the county was originally defined as having the same boundaries as Bates county, but was later declared unconstitutional and changed 19,595 834 sq mi
(2,160 km2)
Warren County 219 Warrenton1833Montgomery CountyJoseph Warren (1741–1775), Revolutionary War doctor and general 36,518 432 sq mi
(1,119 km2)
Washington County 221 Potosi1813Sainte Genevieve CountyGeorge Washington (1732–1799), commander of the Continental Army in the American Revolutionary War and first President of the United States 23,502 760 sq mi
(1,968 km2)
Wayne County 223 Greenville1818Cape Girardeau and Lawrence countiesAnthony Wayne (1745–1796), United States Army general and statesman 10,914 761 sq mi
(1,971 km2)
Webster County 225 Marshfield1855Greene CountyDaniel Webster (1782–1852), U.S. Secretary of State and Senator from Massachusetts 39,735 593 sq mi
(1,536 km2)
Worth County 227 Grant City1861Gentry CountyWilliam J. Worth (1794–1849), a United States general during the Mexican–American War 1,983 266 sq mi
(689 km2)
Wright County 229 Hartville1841Pulaski CountySilas Wright (1795–1847), an American Democratic politician and Governor of New York 18,610 682 sq mi
(1,766 km2)

Former county names
County[3] Etymology[3][10] Changed to[3]
Allen County
Unknown
 Atchison County in 1845
Ashley County William Henry Ashley (1778–1838), early settler Texas County in 1845 upon organization
Decatur County Stephen Decatur (1779–1820), American naval officer[12] Ozark County in 1845
Highland County
Unknown
 Sullivan County in 1845 upon organization
Kinderhook County Kinderhook, New York, birthplace of Martin Van Buren Camden County in 1843
Lillard County James Lillard of Tennessee, who served in the first state legislature of Missouri Lafayette County in 1825
Niangua County Niangua River, a tributary of the Osage River – "niangua" comes from the Native American word nehemgar, which means "a river of numerous springs or sources"[13] Dallas County in 1844 because of the difficulty in pronouncing and spelling Niangua
Seneca County Seneca Nation, a group of Native Americans from New York McDonald County in 1847 upon organization
Van Buren County Martin Van Buren (1782–1862), eighth President of the United States and also Vice President under Andrew Jackson Cass County in 1849 in honor of Van Buren's opponent in the presidential election of 1848

See also

References
  1. "Timeline of Missouri History: 1673–1799". Missouri State Government Web. Retrieved October 10, 2009.
  2. "County Government Links". Missouri State Government Web. Archived from the original on May 23, 2009. Retrieved October 10, 2009.
  3. "What are the Origins of Missouri Counties?". Missouri State Government Web. Retrieved September 17, 2009.
  4. "About St. Louis: Government". City of St. Louis. Archived from the original on June 7, 2011. Retrieved October 12, 2009.
  5. U.S. Census Bureau Archived July 2, 2013, at the Wayback Machine , ("Missouri County Selection Map")
  6. "2020 Population and Housing State Data". U.S. Census Bureau. Retrieved August 12, 2021.
  7. "EPA County FIPS Code Listing". US Environmental Protection Agency. Archived from the original on March 21, 2014. Retrieved September 27, 2009.
  8. "NACo – Find a county". National Association of Counties. Archived from the original on August 28, 2009. Retrieved September 17, 2009.
  9. Beatty, Michael (2001). County Name Origins of the United States. McFarland Press. ISBN 0-7864-1025-6.
  10. Coulet du Gard, René; Coulet Western, Dominique (1981). The Handbook of American Counties, Parishes and Independent Cities. Editions des Deux Mondes. ISBN 0-939586-00-2.
  11. Howard Louis Conard (1901). Encyclopedia of the history of Missouri. New York, Louisville [etc.] The Southern history company, Haldeman, Conard & co., proprietors. p. 68.
  12. Stevens, Walter B. (1921). Centennial history of Missouri (The Center State) One Hundred Years in the Union 1820–1921. Chicago: Clarke Pub. Co. p. 72.
  13. Stevens, Walter B. (1921). Centennial history of Missouri (The Center State) One Hundred Years in the Union 1820–1921. Chicago: Clarke Pub. Co. p. 73.

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