Roseville is a village in Warren County, Illinois, United States. The population was 892 at the 2020 census. It is part of the Galesburg Micropolitan Statistical Area.
Downtown Roseville
Warren County is a county in the U.S. state of Illinois. According to the 2020 census, it had a population of 16,835. Its county seat is Monmouth.
Warren County Courthouse in Monmouth