Libertyville is a village in Libertyville Township, Lake County, Illinois, United States. It is located 5 miles (8 km) west of Lake Michigan, approximately 40 miles north of the Chicago Loop. As such, it is part of the United States Census Bureau's Chicago combined statistical area (CSA). It is bordered by Gages Lake and Gurnee to the north, Vernon Hills to the south, Mundelein to the west, and Grayslake to the northwest. The eastern portions of the village border Mettawa, unincorporated Waukegan and Lake Forest, and part of Knollwood CDP. Its 2020 census population was 20,579.