Illinois Regional Archives Depository (IRAD) System Illinois State Archives
IRAD Home • Administrative Histories / Record Descriptions • Local Government Records Database • Quick Links • Regional Map and Contact Information • Research Policy
Hamilton County
Contact InformationHamilton County Courthouse
100 S. Jackson St.
McLeansboro, IL 62859-1489
618-643-2721 – County Clerk
618-643-3224 – Circuit Clerk
618-643-2721 – Recorder
IRAD—c/o Records Management
Morris Library, Mail Code 6808
Southern Illinois University
1835 University Press Dr.
Carbondale, IL 62901-6808
618-453-3040
Established
- February 8, 1821 (Laws, 1821, p. 113)
Origin of the name of the county
- Named for Alexander Hamilton, a soldier, statesman, author and financier, aid on the staff of Washington during the American Revolution, a member of the Continental Congress, first Secretary of Treasury (1789–1795), and Commander-in-Chief of the United States Army in 1799.
Present area, or parts of it, formerly included in
- 1815–1821 – White
- 1812–1815 – Gallatin
- 1801–1812 – Randolph
- 1795–1801 – St. Clair
- 1790–1795 – Knox, Northwest Territory
County Seats
- 1821–present – McLeansboro
History of county governing board
- 1821–1849 – County Commissioners’ Court
- 1849–1873 – County Court
- 1873–1886 – Board of County Commissioners
- 1886–present – County Board of Supervisors
Township Government
- Adopted – November 3, 1885
Township Names
- Beaver Creek
- Crook
- Crouch
- Dahlgren
- Flannigan
- Knights Prairie
- Mayberry
- McLeansboro
- South Crouch – Formed from Crouch (date unknown: after 1921).
- South Flannigan – Formed from Flannigan (date unknown).
- South Twigg – Formed from Twigg (date unknown).
- Twigg
Township Map
Pertinent Databases