Deer Park is a village in Lake County, Illinois. The population was 3,200 at the 2010 census. The village is one of the few left in the Chicago area that enjoy a green belt which is bordered by two large natural areas providing outdoor recreation and open space. The village is home to popular shopping and dining destinations: Deer Park Town Center and the Town Center Promenade. The town is also home to the Vehe Farm, an Illinois Centennial Farm.
Residential zoning is mainly single family homes with lot of sizes of 1-acre (4,000 m2) or more. Upscale townhomes are available near the Deer Park Center. The Metra/Chicago & Northwestern train line provides commuter service to Chicago with stations in nearby Barrington and Palatine.
Deer Park is located at 42°09′59″N 88°05′09″W.
According to the 2010 census, Deer Park has a total area of 3.825 square miles (9.91 km2), of which 3.71 square miles (9.61 km2) (or 96.99%) is land and 0.115 square miles (0.30 km2) (or 3.01%) is water.
As of the census of 2000, there were 3,102 people, 989 households, and 899 families living in the village. The population density was 850.7 people per square mile (328.1/km²).