JEFFERSON COUNTY MISSOURI HISTORICAL MAPS

 

Jefferson County is located in the east central part of the State of Missouri. It is bounded on the north by St. Louis County; east by the Mississippi River, which separates it from Illinois; south by Ste. Genevieve, St. Francois and Washington Counties; and west by Franklin County. It has a land area of 423,000 acres.

 

Jefferson County was officially formed on December 8, 1818 with Herculaneum, then a town of 200 serving as the County seat. The County seat was moved to the present day location of Hillsboro on February 8, 1839.

 

 

District of Louisiana 1804

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Territory of Missouri 1812

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Territory of Missouri 1821 showing Jefferson County

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1860 Missouri Counties

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