Monmouth is a city in and the county seat of Warren County, Illinois, United States. The population was 8,902 at the 2020 census, down from 9,444 in 2010. It is the home of Monmouth College and contains Monmouth Park, Harmon Park, North Park, Warfield Park, West Park, South Park, Garwood Park, Buster White Park and the Citizens Lake & Campground. It is the host of the Prime Beef festival, held annually the week after Labor Day. The festival is kicked off with one of the largest parades in Western Illinois. Monmouth is also known regionally as the "Maple City". It is part of the Galesburg Micropolitan Statistical Area. History The town established in 1831 was originally going to be called Kosciusko (the name was drawn out of a hat), but the founders of the town feared that it would be difficult to spell and pronounce. The name 'Monmouth' was put forward by a resident who had lived in Monmouth County, New Jersey. In 1841, Latter Day Saint movement founder Joseph Smith appeared before Judge Stephen A. Douglas in an extradition hearing held at Monmouth's Warren County courthouse. The hearing, which was to determine whether Smith should be returned to Missouri to face murder charges, resulted in freedom for the defendant, as it was determined that his arrest had been invalid. Attorney Orville Browning, who would assume Douglas's Senate seat following his death, represented Smith. Gunfighter Wyatt Earp was born in Monmouth. For many years, the town watertower boasted that Monmouth was the "Home of Wyatt Earp." Controversial Civil War general Eleazer A. Paine practiced law there for many years. Abner C. Harding, Civil War General and Republican Congressman, lived in Monmouth and is buried in Monmouth Cemetery. Ronald Reagan lived in Monmouth for a while as a child when his father worked as a shoe salesman at the Colwell Department Store and mass murderer Richard Speck lived in Monmouth briefly as a child, and again in the spring of 1966. Monmouth College, a private liberal arts college affiliated with the Presbyterian Church (U.S.A.), was founded in Monmouth in 1853 by Cedar Creek & South Henderson Presbyterian Churches. With James Cochran Porter & Robert Ross Founding in 1852 Monmouth Academy. The Rev. David Alexander Wallace serving as the first President 1856–1878. It is the second-largest employer in the city. Pi Beta Phi, the first national secret college society of women to