Missouri Digital Heritage :: Collections :: County Records on Microfilm :: Organization of Counties

Organization of Counties

Missouri has 114 counties. The first counties were organized in 1812 and the last in 1861. The City of St. Louis became a separate governing entity from St. Louis County in 1876.

1812 1  October Cape Girardeau, New Madrid, St. Charles, St. Louis, and Ste. Genevieve
1813 21  August Washington
1816 23  January Howard
1818 8  December Jefferson
11  December Franklin, Wayne
14  December Lincoln, Madison, Montgomery, Pike
17  December Cooper
1820 16  November Boone, Chariton, Cole, Lillard  (now Lafayette), Perry, Ralls, Ray
25  November Callaway, Gasconade, Saline
1821 19  December St. Francois
28  December Scott
1822 2  January Clay
1826 15  December Jackson
23  December Marion
1829 22  January Randolph
23  January Crawford
1831 6  January Monroe
1833 2  January Carroll, Clinton, Greene, Lewis
5  January Morgan, Ripley, Warren
19  January Pulaski
26  January Pettis
1834 13  December Rives (later Henry), Johnson
1835 2  January Shelby, Stoddard
3  January Benton
5  January Barry, Polk
3  March Van Buren (later Cass)
1836 16  December Clark
17  December Audrain
29  December Caldwell, Daviess
1837 6  January Linn, Livingston, Macon, Taney
6  February Miller
1838 31  December Buchanan, Newton, Platte
1841 29  January Adair, Andrew, Bates, Dade, Grundy, Jasper, Kinderhook (later Camden), Niangua (later Dallas), Nodaway (later Holt), Osage, Ozark (later Decatur, then Ozark again), St. Clair, Scotland, Shannon, Wright
1845 14  February Atchison (defined as Allen in 1843), Cedar, Dunklin, Gentry, Harrison, Hickory, Knox, Lawrence, Mercer, Mississippi, Moniteau, Nodaway, Oregon, Schuyler, Sullivan (defined as Highland in 1843), Texas (defined as Ashley  in 1843)
25  February DeKalb, Reynolds
28  February Putnam
1846 18  December Dodge (abolished and added to Putnam in 1853)
1849 24  February Laclede
27  February Butler
3  March McDonald (defined as Seneca in 1847)
1851 10  February Dent, Stone
19  February Pemiscot
1  March Bollinger
1855 27  February Vernon
2  March Maries
3  March Webster
12  December Barton
1857 17  February Iron
2  March Howell
29  October Douglas
13  November Phelps
1859 8  March Christian
10  March Carter
1861 8  February Worth
1876 22  August St. Louis City separated from St. Louis County