Jefferson County is named for Thomas Jefferson, who was President of the United States from 1801 to 1809, an American revolutionary leader and author of the Declaration of Independence.
Created: March 26, 1819
Mount Vernon 1819 – present
County Courthouse – Mount Vernon
Location: 100 10th Street / Main Street
Built: 1939 – 1941
Style: Art Deco
Architect: William R McCoy of McCoy and Wilson
Contractor: J M Stover and other local trades
Description: The building faces south and is a three story gray colored stone structure. The south front has three vertical sections dived by stone pillars and with doorway in the center and a large window on the east and west section on the first story, and large windows in each panel on the second story. Above the doorway is a clock. The third story is recessed. The building has square lines with sections protruding from the main building. The building was constructed under the Works Progress Administration.
See: Illinois Appellate Court – Mount Vernonis located in the county.
N – Marion County
S – Franklin County
Photos taken 2007 and 2012