Illinois Regional Archives Depository (IRAD) System Illinois State Archives

St. Clair County

St. Clair County Courthouse Contact Information
St. Clair County Building
10 Public Square
Belleville, IL 62220
618-277-6600, ext. 2380 – County Clerk
618-277-6600, ext. 2324 – Circuit Clerk
618-277-6600, ext. 2479 – 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

* Arthur St. Clair established three judicial districts with court sessions held in Cahokia, Kaskaskia and Prairie du Rocher. With the formation of Randolph County in 1795, Cahokia became the sole seat of government for St. Clair County.

History of county governing board

Township Government

Township Names

Township Map

St. Clair County Township Map

Pertinent Databases