Illinois Regional Archives Depository (IRAD) System Illinois State Archives

Jefferson County

Jefferson County Courthouse Contact Information
Jefferson County Courthouse
100 S. 10th St.
Mt. Vernon, IL 62864
618-244-8020 – County Clerk
618-244-8007 – Circuit Clerk
618-244-8020 – Recorder

IRAD—c/o Records Management
Morris Library, Mail Code 6808
Southern Illinois University
1835 University Press Dr.
Carbondale, IL 62901-6808


Origin of the name of the county

Present area, or parts of it, formerly included in

County Seats

History of county governing board

Township Government

Township Names

Township Map

Jefferson County Township Map

Pertinent Databases