Monmouth-Roseville High School, or MRHS, is a public four-year high school located at 325 West 1st Avenue in Monmouth, Illinois, a city of Warren County, Illinois, in the Midwestern United States. MRHS is part of Monmouth-Roseville Community Unit School District 238, which also includes Monmouth-Roseville Junior High School, Central Intermediate School, Harding Primary School, and Lincoln Early Childhood School. The campus is located in Monmouth, IL, 17 miles west of Galesburg, Illinois, and serves a mixed city, village, and rural residential community. The school is in the Galesburg micropolitan statistical area which includes all of Knox and Warren counties. The school is located less than 1 mile from Monmouth College.