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Monmouth, Illinois

City: Monmouth

County: Warren

State: Illinois

Lat/Long: 40.9000, -90.6333

Monmouth became the permanent county seat of Warren County in 1831. Monmouth operated under a town system until 1852, when the Illinois General Assembly incorporated it as a city.

"An Act to Establish a Permanent Seat of Justice for Warren County," 27 January 1831, Laws of Illinois (1831), 67-68; The Past and Present of Warren County, Illinois (Chicago: H. F. Kett, 1877), 141-43; "An Act to Incorporate the City of Monmouth," 21 June 1852, Laws of Illinois (1852), 68-77.