Adair created 29Jan1841 from Macon

Mo Co., Origins

Adair created 29Jan1841 from Macon

Allen created 1843 from Holt

Andrew created 29Jan1841 from Platte Purchase

Ashley created 17Feb1843 from Shannon & Wright

Atchison renamed 14Feb1845 from Allen

Audrain created 17Dec1836 from Callaway, Monroe & Ralls

Barry created 05Jan1835 from Greene

Barton created 12Dec1855 from Jasper

Bates created 29Jan1841 from VanBuren

Benton created 03Jan1835 from Pettis & Greene

Bollinger created 01Mar1851 from Cape Girardeau, Madison, Stoddard & Wayne

Boone created 16Nov1820 from Howard

Buchanan created 31Dec1838 from Platte Purchase

Butler created 27Feb1849 from Wayne

Caldwell created 29Dec1836 from Ray

Callaway created 25Nov1820 from Boone, Howard & Montgomery

Camden renamed 23Feb1843 from Kinderhook

Cape Girardeau created 01Oct1812 Original

Carroll created 02Jan1833 from Ray

Carter created 10Mar1859 from Oregon, Reynolds, Ripley & Shannon

Cass renamed 19Feb1849 from VanBuren

Cedar created 14Feb1845 from Dade & St.Clair

Chariton created 16Nov1820 from Howard

Christian created 08Mar1859 from Greene, Taney & Webster

Clark created 16Dec1836 from Lewis

Clay created 02Jan1822 from Ray

Clinton created 02Jan1833 from Clay

Cole created 16Nov1820 from Cooper

Cooper created 17Dec1818 from Howard

Crawford created 23Jan1829 from Gasconade

Dade created 29Jan1841 from Barry & Polk

Dallas renamed 16Dec1844 from Niangua

Daviess created 29Dec1836 from Ray

Decatur renamed 29Jan1841 from Ozark

DeKalb created 25Feb1845 from Clinton

Dent created 10Feb1851 from Crawford & Shannon

Douglas created 29Oct1857 from Ozark

Dunklin created 14Feb1845 from Stoddard

Franklin created 11Dec1818 from St.Louis

Gasconade created 25Nov1820 from Franklin

Gentry created 14Feb1845 from Clinton

Greene created 02Jan1833 from Crawford & Wayne

Grundy created 29Jan1841 from Livingston

Harrison created 14Feb1845 from Daviess

Henry renamed 15Oct1841 from Rives

Hickory created 14Feb1845 from Benton & Polk

Highland created 17Feb1843 Linn County

Holt renamed 14Feb 1841 from Nodaway

Howard created 23Jan1816 from St.Charles & St.Louis

Howell created 02Mar1857 from Oregon

Iron created 17Feb1857 from Madison, Reynolds, St.Francois, Washington & Wayne

Jackson created 15Dec1826 from Lillard

Jasper created 29Jan1841 from Barry

Jefferson created 08Dec1818 from St. Louis & St.Genevieve

Johnson created 13Dec1834 from Lillard

Kinderhook created 29Jan1841 from Benton, Morgan & Pulaski

Knox created 14Feb1845 from Scotland

Laclede created 24Feb1849 from Camden, Pulaski & Wright

Lafayette renamed 16Feb1825 from Lillard

Lawrence created 14Feb1845 from Barry & Dade

Lewis created 02Jan1833 from Marion

Lillard created 16Nov1820 from Cooper

Lincoln created 14Dec1818 from St.Charles

Linn created 06Jan1837 from Chariton

Livingston created 06Jan1837 from Carroll

Macon created 06Jan1837 from Chariton & Randolph

Madison created 14Dec1818 from Cape Girardeau & St.Genevieve

Maries created 02Mar1855 from Osage & Pulaski

Marion created 23Dec1826 from Ralls

McDonald renamed 01Jan1847 from Seneca

Mercer created 14Feb1845 from Grundy

Miller created 06Feb1837 from Cole & Pulaski

Mississippi created 14Feb1845 from Scott

Moniteau created 14Feb1845 from Cole & Morgan

Monroe 06Jan1831 from Ralls

Montgomery created 14Dec1818 from St.Charles

Morgan created 05Jan1833 from Cooper

New Madrid created 01Oct1812 Original

Newton created 31Dec1838 Barry County
Niangua created 29Jan1841 from Polk

Nodaway (old) created 29Jan1841 from Platte Purchase

Nodaway created 14Feb1845 from Andrew

Oregon created 14Feb1845 from Ripley

Osage created 29Jan1841 from Gasconade

Ozark created 29Jan1841 from Taney

Ozark renamed 22Feb1843 from Decatur

Pemiscot created 19Feb1851 from New Madrid

Perry created 16Nov1820 from St.Genevieve

Pettis created 26Jan1833 from Cooper & Saline

Phelps created 13Nov1857 from Crawford

Pike created 14Dec1818 from St.Charles

Platte Purchase in 1836 from Ioway, Sac & Fox Indian lands 28Mar1837 added to MO

Platte created 31Dec1838 from Platte Purchase

Polk created 05Jan1835 from Greene

Pulaski created 19Jan1833 from Crawford

Putnam created 28Feb1845 from Adair & Sullivan

Ralls created 16Nov1820 from Pike

Randolph created 22Jan1829 from Chariton & Ralls

Ray created 16Nov1820 from Howard

Reynolds created 25Feb1845 from Shannon

Rives created 13Dec1834 from Lillard

Ripley created 05Jan1833 from Wayne

St.Charles created 01Oct1812 Original

St.Clair created 29Jan1841 from Rives

St.Francois created 19Dec1821 from Jefferson, St.Genevieve & Washington

St.Genevieve created 01Oct1812 Original

St.Louis City created 22Aug1876 St.Louis

St.Louis created 01Oct1812 Original

Saline created 25Nov1820 from Cooper

Schuyler created 14Feb1845 from Adair

Scotland created 29Jan1841 from Clark, Lewis, & Shelby

Scott created 28Dec1821 from New Madrid

Seneca created 03Mar1849 from Newton

Shannon created 29Jan1841 from Ripley

Shelby created 02Jan1835 from Marion

Stoddard created 02Jan1835 from New Madrid

Stone created 10Feb1851 from Taney

Sullivan renamed 14Feb1845 from Highland

Taney created 06Jan1837 from Greene

Texas renamed 14Feb1845 from Ashley

VanBuren created 03Mar1835 from Jackson

Vernon created 27Feb1855 Bates County

Warren created 05Jan1833 from Montgomery

Washington created 21Aug1813 from St.Genevieve

Wayne created 11Dec1818 from Cape Girardeau & Lawrence

Webster created 03Mar1855 from Greene

Worth created 08Feb1861 from Gentry

Wright created 29Jan1841 from Pulaski

Timeline

Missouri Territory created 30Apr1812