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County County Seat Created Formed From Named For Host Mailing List
Adair County
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Kirksville 1841 Macon John Adair, a pioneer, soldier, and seventh governor of Kentucky ADOPTABLE Mailing List
Allen County Defunct 1843 Holt and Platte Purchase Unknown Changed to Atchison in 1845  
Andrew County Savannah 1841 Platte Purchase Andrew Jackson Davis, spiritualist and citizen of St Louis and Savannah ADOPTABLE Mailing List
Ashley County Defunct 1843 Shannon and Wright Unknown Changed to Texas in 1845  
Atchison County Rock Port 1845 Allen US Senator David Rice Atchison, a Democrat from Missouri ADOPTABLE Mailing List
Audrain County Mexico 1831 Callaway, Monroe and Ralls James H Audrain, Missouri Legislator ADOPTABLE Mailing List
Barry County Cassville 1835 Greene William Taylor Barry, jurist and United States Postmaster General ADOPTABLE Mailing List
Barton County Lamar 1855 Jasper US Senator David Barton, one of the first senators from Missouri Katy Hestand Mailing List
Bates County Butler 1841 VanBuren Frederick Bates, the second governor of Missouri ADOPTABLE Mailing List
Benton County Warsaw 1835 Pettis and Greene Thomas Hart Benton, U.S. Senator from Missouri ADOPTABLE Mailing List
Bollinger County Marble Hill 1851 Cape Girardeau, Madison, Stoddard and Wayne George Frederick Bollinger, early settler of Missouri ADOPTABLE Mailing List
Boone County Columbia 1821 Howard Daniel Boone Katy Hestand Mailing List
Buchanan County St Joseph 1838 Platte Purchase James Buchanan, 15th President of the United States ADOPTABLE Mailing List
Butler County Poplar Bluff 1849 Wayne William O Butler, US Representative from Kentucky and vice-presidential nominee under Lewis Cass ADOPTABLE Mailing List
Caldwell County Kingston 1836 Ray The origin of the name is disputed—either John Caldwell, an Indian scout; John Caldwell of Kentucky; or Mathew Caldwell, a signer of the Texas Declaration of Independence ADOPTABLE Mailing List
Callaway County Fulton 1821 Boone, Howard and Montgomery James Callaway, soldier during the War of 1812 and grandson of Daniel Boone ADOPTABLE Mailing List
Camden County Camdenton 1843 Kinderhook Charles Pratt, 1st Earl Camden, an English lawyer, judge and Whig politician ADOPTABLE Mailing List
Cape Girardeau County Jackson 1812 Original Sieur de Girardot, a French officer and early explorer of the region Katy Hestand Mailing List
Carroll County Carrollton 1833 Ray Charles Carroll, delegate to the Continental Congress and U.S. Senator for Maryland ADOPTABLE Mailing List
Carter County VanBuren 1859 Oregon, Reynolds, Ripley and Shannon Zimri Carter, pioneer settler ADOPTABLE Mailing List
Cass County Harrisonville 1849 VanBuren Lewis Cass, senator from Michigan ADOPTABLE Mailing List
Cedar County Stockton 1845 Dade and St Clair Named for the abundance of Eastern Red Cedar trees K. Hestand Mailing List
Chariton County Keytesville 1821 Howard Chariton River, a tributary of the Missouri River, whose naming origin is disputed ADOPTABLE Mailing List
Christian County Ozark 1859 Greene, Taney and Webster William Christian, soldier and politician who served in the American Revolution ADOPTABLE Mailing List
Clark County Kahoka 1836 Lewis William Clark, American explorer, soldier, Indian agent, and territorial governor ADOPTABLE Mailing List
Clay County Liberty 1822 Ray Henry Clay, American statesman and orator from Kentucky ADOPTABLE Mailing List
Clinton County Plattsburg 1833 Clay George Clinton, soldier and politician, considered one of the Founding Fathers of the United States ADOPTABLE Mailing List
Cole County Jefferson City 1820 Cooper Stephen Cole, pioneer ADOPTABLE Mailing List
Cooper County Boonville 1818 Howard Sarshel Benjamin Cooper, pioneer settler ADOPTABLE Mailing List
Crawford County Steelville 1829 Gasconade William H Crawford, politician and judge ADOPTABLE Mailing List
Dade County Greenfield 1841 Barry and Polk Major Francis L Dade, Major in the U.S. 4th Infantry Regiment, United States Army, during the Second Seminole War Katy Hestand Mailing List
Dallas County Buffalo 1844 Niangua George M Dallas, US Vice President under James K Polk ADOPTABLE Mailing List
Daviess County Gallatin 1836 Ray Joseph Hamilton Daviess, commanded the Dragoons of the Indiana Militia at the Battle of Tippecanoe ADOPTABLE Mailing List
Decatur County Defunct 1841 Taney Stephen Decatur, American naval officer Changed to Ozark in 1845  
DeKalb County Maysville 1843 Clinton Johann de Kalb, a German soldier who served as a major general in the Continental Army during the American Revolutionary War ADOPTABLE Mailing List
Dent County Salem 1851 Crawford and Shannon James Dent, settler ADOPTABLE Mailing List
Douglas County Ava 1857 Ozark Stephen A Douglas, American politician from the state of Illinois, and the Democratic nominee for President in 1860 ADOPTABLE Mailing List
Dunklin County Kennett 1843 Stoddard Daniel Dunklin, fifth governor of Missouri ADOPTABLE Mailing List
Franklin County Union 1818 St Louis Benjamin Franklin, one of the Founding Fathers of the United States of America ADOPTABLE Mailing List
Gasconade County Hermann 1821 Franklin Gasconade 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 ADOPTABLE Mailing List
Gentry County Albany 1841 Clinton Richard Gentry, a distinguished American military colonel ADOPTABLE Mailing List
Greene County Springfield 1833 Crawford and Wayne Nathanael Greene, a major general of the Continental Army in the American Revolutionary War Katy Hestand Mailing List
Grundy County Trenton 1839 Livingston Felix Grundy, US Congressman and US Senator from Tennessee who also served as the 13th Attorney General of the United States ADOPTABLE Mailing List
Harrison County Bethany 1843 Daviess Albert G. Harrison, U.S. Representative from Missouri ADOPTABLE Mailing List
Henry County Clinton 1834 Lillard Patrick Henry, first post-colonial Governor of Virginia and prominent figure in the American Revolution ADOPTABLE Mailing List
Hickory County Hermitage 1845 Benton and Polk Andrew Jackson (1767–1845), who was nicknamed "Old Hickory" because of his toughness ADOPTABLE Mailing List
Highland County Defunct 1843 Linn Unknown Changed to Sullivan in 1845  
Holt County Oregon 1841 Platte Purchase David Rice Holt, state legislator ADOPTABLE Mailing List
Howard County Fayette 1816 St Charles and St Louis Benjamin Howard (1760–1814), a Congressman from Kentucky, governor of Missouri Territory and a brigadier general in the War of 1812 ADOPTABLE Mailing List
Howell County West Plains 1857 Oregon Disputed - either James Howell - a pioneer settler, or Thomas J Howell ADOPTABLE Mailing List
Iron County Ironton 1857 Madison, Reynolds, St Francois, Washington and Wayne Abundance of Iron ore in the area ADOPTABLE Mailing List
Jackson County Kansas City, Independance 1826 Lillard Andrew Jackson, US Senator from Tennessee and later President of the United States ADOPTABLE Mailing List
Jasper County Carthage 1841 Barry William Jasper, a noted American soldier in the Revolutionary War In transition Mailing List
Jefferson County Hillsboro 1818 St Louis and Ste Genevieve Thomas Jefferson, third President of the United States, principal author of the Declaration of Independence, and one of the most influential Founding Fathers ADOPTABLE Mailing List
Johnson County Warrensburg 1834 Lillard Richard M. Johnson (1780–1850), ninth Vice President of the United States, serving in the administration of Martin Van Buren ADOPTABLE Mailing List
Kinderhook County Defunct 1841 Benton, Morgan and Pulaski Kinderhook, New York, Birthplace of Martin VanBuren Changed to Camden in 1843  
Knox County Edina 1843 Scotland Henry Knox an American bookseller from Boston who became the chief artillery officer of the Continental Army and later the nation's first Secretary of War ADOPTABLE Mailing List
Laclede County Lebanon 1849 Camden, Pulaski and Wright Pierre Laclede, founder of St Louis, Missouri ADOPTABLE Mailing List
Lafayette County Lexington 1825 Lillard Gilbert du Motier, the Marquis de Lafayette, French military officer and general in the American Revolutionary War ADOPTABLE Mailing List
Lawrence County Mount Vernon 1843 Barry and Dade James Lawrence, an American naval officer best known for his last words "Don't give up the ship!" In Transition Mailing List
Lewis County Monticello 1843 Marion Meriwether Lewis, explorer and governor of the Louisiana Territory ADOPTABLE Mailing List
Lillard Defunct 1821 Cooper James Lillard of Tennessee, who served in the first state legislature of Missouri Changed to Lafayette in 1825  
Lincoln County Troy 1818 St Charles Disputed: either Lincoln County, North Carolina and Lincoln County, Kentucky (by Christopher Clark, a Missouri legislator who had lived in the other counties),[11] or for Benjamin Lincoln, an American revolutionary war general ADOPTABLE Mailing List
Linn County Linneus 1837 Chariton Lewis F Linn, a Jacksonian Democratic U.S. Senator for Missouri and born in Kentucky ADOPTABLE Mailing List
Livingston County Chillicothe 1837 Carroll Edward Livingston, 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 ADOPTABLE Mailing List
Macon County Macon 1837 Chariton and Randolph Nathaniel Macon, member of the United States House of Representatives from 1791 to 1815 who briefly served in the American Revolutionary War ADOPTABLE Mailing List
Madison County Fredericktown 1818 Cape Girardeau and Ste Genevieve James Madison, politician and political philosopher who served as the fourth President of the United States, and one of the Founding Fathers of the United States ADOPTABLE Mailing List
Maries County Vienna 1855 Osage and Pulaski Maries River, possibly a corruption of the French word marias meaning "marsh" or "swamp" ADOPTABLE Mailing List
Marion County Palmyra 1826 Ralls Francis Marion, a military officer who served in the American Revolutionary War ADOPTABLE Mailing List
McDonald County Pineville 1847 Seneca Alexander McDonald, American Revolutionary War soldier Jeanne Hicks Mailing List
Mercer County Princeton 1845 Grundy John F Mercer, an American lawyer, planter, and politician from Virginia and Maryland ADOPTABLE Mailing List
Miller County Tuscumbia 1837 Cole and Pulaski John Miller, an American publisher and politician from St Louis, Missouri. He was the fourth Governor of Missouri and represented Missouri in the US House ADOPTABLE Mailing List
Mississippi County Charleston 1842 Scott Mississippi River, the second-longest river in the United States which forms Missouri's eastern border ADOPTABLE Mailing List
Moniteau County California 1845 Cole and Morgan Moniteau Creek, "moniteau" is a French spelling of manitou, Algonquian for the Great Spirit ADOPTABLE Mailing List
Monroe County Paris 1831 Ralls James Monroe, fifth President of the United States who helped create the Missouri Compromise ADOPTABLE Mailing List
Montgomery County Montgomery City 1818 St Charles Richard Montgomery, 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 ADOPTABLE Mailing List
Morgan County Versailles 1833 Cooper Daniel Morgan, American pioneer, soldier, and United States Representative from Virginia ADOPTABLE Mailing List
New Madrid County New Madrid 1818 Original Madrid, Spain ADOPTABLE Mailing List
Newton County Neosho 1838 Barry John Newton, popular fictionalized soldier of the American Revolution Jeanne Hicks Mailing List
Niangua County Defunct 1841 Polk 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" Changed to Dallas in 1844 because it was too difficult to pronounce and spell  
Nodaway County Maryville 1843 Andrew and Platte Purchase Nodaway River, a 120-mile (190-km) long river in southwest Iowa and northwest Missouri ADOPTABLE Mailing List
Oregon County Alton 1841 Ripley Oregon Territory ADOPTABLE Mailing List
Osage County Linn 1841 Gasconade Osage River, a 360 miles (579 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 ADOPTABLE Mailing List
Ozark County Gainesville 1845 Decatur Ozark Mountains – Ozark is the anglicized form of the French "aux arcs", an abbreviation of "Aux Arkansas", which means in the county of Arkansas In transition Mailing List
Pemiscot County Caruthersville 1851 New Madrid An American Indian word meaning "liquid mud" ADOPTABLE Mailing List
Perry County Perryville 1821 Ste Genevieve Oliver Hazard Perry, 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 ADOPTABLE Mailing List
Pettis County Sedalia 1833 Cooper and Saline Spencer Darwin Pettis, US Representative from Missouri ADOPTABLE Mailing List
Phelps County Rolla 1857 Crawford John S Phelps, a politician, soldier during the American Civil War, and twenty-third Governor of Missouri ADOPTABLE Mailing List
Pike County Bowling Green 1818 St Charles Zebulon Pike, American soldier and explorer for whom Pikes Peak in Colorado is also named ADOPTABLE Mailing List
Platte County Platte City 1838 Platte Purchase Platte River, a tributary of the Missouri River, which is in turn named for the French word "platte" meaning flat or shallow ADOPTABLE Mailing List
Polk County Bolivar 1835 Greene James K Polk, 11th President of the United States In transition Mailing List
Pulaski County Waynesville 1833 Crawford Kazimierz Pulaski, Polish soldier of fortune in the American Revolutionary War, he saved the life of George Washington and became a general in the Continental Army ADOPTABLE Mailing List
Putnam County Unionville 1843 Adair and Sullivan Israel Putnam, an American army general who fought with distinction at the Battle of Bunker Hill during the American Revolutionary War ADOPTABLE Mailing List
Ralls County New London 1821 Pike Daniel Ralls, a Missouri legislator ADOPTABLE Mailing List
Randolph County Huntsville 1829 Chariton and Ralls John Randolph of Roanoke, a leader in Congress from Virginia and spokesman for the "Old Republican" ADOPTABLE Mailing List
Ray County Richmond 1820 Howard John Ray, a Missouri legislator Vivian Storm Mailing List
Reynolds County Centerville 1845 Shannon Thomas Reynolds, governor of Missouri from 1840 to 1844 ADOPTABLE Mailing List
Ripley County Doniphan 1831 Wayne Eleazer Wheelock Ripley, Brigadier General in the War of 1812 ADOPTABLE Mailing List
St Charles County St Charles 1812 Original St Charles Borromeo, an Italian saint and cardinal of the Roman Catholic Church ADOPTABLE Mailing List
St Clair County Osceola 1841 Rives Arthur St Clair, an American soldier and politician ADOPTABLE Mailing List
St Francois Farmington 1821 Jefferson, Ste Genevieve and Washington St Francis of Assisi, a Catholic deacon and the founder of the Order of Friars Minor, more commonly known as the Franciscans ADOPTABLE Mailing List
St Louis City St Louis 1876 St Louis Co King Louis IX, King of France from 1226 until his death ADOPTABLE Mailing List
St Louis County Clayton 1812 Original King Louis IX, King of France from 1226 until his death ADOPTABLE Mailing List
Ste Genevieve County Ste Genevieve 1812 Original St. Genevieve, the patron saint of Paris in Roman Catholic and Eastern Orthodox tradition katy Mailing List
Saline County Marshall 1820 Cooper Local Hot Springs ADOPTABLE Mailing List
Schuyler County Lancaster 1843 Adair Philip Schuyler, a general in the American Revolution and a United States Senator from New York ADOPTABLE Mailing List
Scotland County Memphis 1841 Clark, Lewis and Shelby Country of Scotland ADOPTABLE Mailing List
Scott County Benton 1822 New Madrid John Guier Scott, a U.S. Representative from Missouri ADOPTABLE Mailing List
Seneca County Defunct 1847 Newton Seneca Nation, a group of Native Americans from New York Changed to McDonald in 1847  
Shannon County Eminence 1837 Ripley George Shannon, member of the Lewis and Clark Expedition ADOPTABLE Mailing List
Shelby County Shelbyville 1835 Marion Isaac Shelby, the first and fifth Governor of Kentucky ADOPTABLE Mailing List
Stoddard County Bloomfield 1835 New Madrid Amos Stoddard, 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 ADOPTABLE Mailing List
Stone County Galena 1851 Taney William Stone, pioneer judge of Taney County Katy Mailing List
Sullivan County Milan 1845 Highland John Sullivan, American Revolutionary War general ADOPTABLE Mailing List
Taney County Forsyth 1837 Greene Roger Brooke Taney, eleventh United States Attorney General and fifth Chief Justice of the United States ADOPTABLE Mailing List
Texas County Houston 1845 Ashley Republic of Texas ADOPTABLE Mailing List
VanBuren Defunct 1833 Jackson Martin Van Buren, eighth President of the United States and also Vice President under Andrew Jackson Changed to Cass County in 1849 in honor of Martin VanBuren's opponent  
Vernon County Nevada 1851 Bates Miles Vernon, state senator – the county was originally defined as having the same boundaries as Bates county, but was later declared unconstitutional and changed ADOPTABLE Mailing List
Warren County Warrenton 1833 Montgomery Joseph Warren, Revolutionary War doctor and soldier ADOPTABLE Mailing List
Washington County Potosi 1813 Ste Genevieve George Washington, commander of the Continental Army in the American Revolutionary War and first President of the United States ADOPTABLE Mailing List
Wayne County Greenville 1818 Cape Girardeau and Lawrence Anthony Wayne, United States Army general and statesman ADOPTABLE Mailing List
Webster County Marshfield 1855 Greene Daniel Webster, US Secretary of State ADOPTABLE Mailing List
Worth County Grant City 1861 Gentry William J Worth, a United States general during the Mexican-American War ADOPTABLE Mailing List
Wright County Hartville 1841 Pulaski Silas Wright, an American Democratic politician ADOPTABLE Mailing List
2012 K. Hestand: The unauthorized reproduction or distribution of this copyrighted work is illegal. Criminal copyright infringement, including infringement without monetary gain, is investigated by the FBI and is punishable by up to 5 years in federal prison and a fine of $250,000.

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