ILLINOIS STATE ARCHIVES

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Warren County

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–  — Monmouth

History of county governing board
1830–1849 — County Commissioners’ Court
1849–1854 — County Court
1854–  — 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
Federal Township Plats of Illinois
Illinois Public Domain Land Tract Sales Database
Illinois Statewide Death Index, 1916–1950
Illinois Statewide Marriage Index
Local Governmental Records Database
Name Index to Illinois Local Governments