This came from a list I copied back in 1999, this is not all the county's for the state of MO. and I cannot guarantee accuracy. This will hopefully give you a clue as to where you might go look if you can't find your "Person" in a certain county. Vernon Co. was not formed until 1855, before that it was Bates Co., county seat Nevada. Bates Co., was not formed until 1841 from Cass Co., the county seat is Butler. Cass Co., was formed by renameing it from Van Buren Co in 1849. Van Buren Co. (extinct) was formed in 1835 from Jackson Co., it was renamed in 1849. Jackson Co was formed in 1826 from Lafayette Co., the county seat is Independence. Lafayette Co., was formed by renaming Lillard Co, the county seat is Lexington. Lillard Co. (extinct) was formed in 1820 from Cooper Co., renamed Lafayette Co. 1825 Cooper Co., was formed in 1818 from Howard Co., county seat is Boonville. Howard Co., was formed in 1816 from parts of St.Charles and St Louis Counties the county seat is Fayette St. Charles county was formed in 1812 as an Original District; the county seat is St. Charles St. Louis county was formed in 1812 as an Original District; the county seat is St Charles. St. Louis county was formed in 1876 from the Original District land and parts of the City of St. Louis, the county seat is Clayton St Louis City was first settled in 1764 and officially recogized as an American city in 1804; it is an original district. It is not a county as such; records are in the city.