  libertyville is a village in lake county, illinois, united states and an affluent northern suburb of chicago. it is located  west of lake michigan on the des plaines river. the 2010 census population was 20,315.{{cite web| url=http://factfinder2.census.gov/bkmk/table/1.0/en/dec/1
Chicago_metropolitan_area Libertyville,_Illinois Populated_places_established_in_1836 Villages_in_Lake_County,_Illinois