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Warren County
Contact InformationWarren County Courthouse
100 W. Broadway
Monmouth, IL 61462
309-734-8592 – County Clerk
309-734-5179 – Circuit Clerk
309-734-8592 – Recorder
IRAD Depository
University Library
Western Illinois University
1 University Circle
Macomb, IL 61455-1390
309-298-2716
Established
- January 13, 1825 (Laws, 1825, p. 93)
- County organization was completed in July, 1830.
Origin of the name of the county
- Named for Joseph Warren, a physician and soldier who served at Lexington, a Major General of the Massachusetts militia. He was killed at the battle of Bunker Hill.
Present area, or parts of it, formerly included in
- 1826–1830 – Attached to Peoria County (Laws, 1826, p. 76–77)
- 1825–1826 – Attached to Schuyler County (Laws, 1825, p. 95)
- 1812–1825 – Pike
- 1812–1821 – Madison
- 1795–1812 – St. Clair
County Seats
- 1830–1831 – House of Alexis Phelps, at Lower Yellow Banks, now Oquawka (Temporary designation.)
- 1831–present – Monmouth
History of county governing board
- 1830–1849 – County Commissioners’ Court
- 1849–1854 – County Court
- 1854–present – County Board of Supervisors
Township Government
- Adopted – November 8, 1853
Township Names
- Berwick
- Cold Brook
- Ellison
- Floyd
- Greenbush
- Hale
- Kelly – Name changed from Warren on May 8, 1855.
- Lenox – Name changed from Ripley on May 8, 1855.
- Monmouth
- Point Pleasant
- Roseville
- Spring Grove
- Sumner – Name changed from Union on May 8, 1855.
- Swan
- Tompkins
Township Map
Pertinent Databases