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is a village in Lake County, Illinois, United States. The population was 20,120 at the 2000 census, and estimated to be 23,957 as of 2005. Vernon Hills serves as a retail hub for its surrounding area (Libertyville, Lake Forest, Mundelein, Lincolnshire, Buffalo Grove,).
According to the United States Census Bureau, the village has a total area of 7.6 square miles (19.7 km²), of which, 7.4 square miles (19.2 km²) of it is land and 0.2 square miles (0.5 km²) of it (2.49%) is water.