Round Lake Park is a village in Lake County, Illinois, United States. The population was 7,505 at the 2010 census. It is located along the south side of the lake, Round Lake. Access to the lake from this town is private and only for residents of Round Lake Park.
Round Lake Park is located at 42°20′37″N 88°4′45″W (42.343688, -88.079175).
According to the 2010 census, Round Lake Park has a total area of 2.28 square miles (5.91 km2), of which 2.08 square miles (5.39 km2) (or 91.23%) is land and 0.2 square miles (0.52 km2) (or 8.77%) is water.
As of the census of 2000, there were 6,038 people, 2,131 households, and 1,562 families residing in the village. The population density was 2,019.4 people per square mile (779.7/km2). There were 2,229 housing units at an average density of 745.5 per square mile (287.8/km2). The racial makeup of the village was 81.24% White, 1.72% African American, 0.36% Native American, 0.55% Asian, 0.02% Pacific Islander, 13.53% from other races, and 2.58% from two or more races. Hispanic or Latino of any race were 26.23% of the population.
There were 2,131 households, out of which 32.8% had children under the age of 18 living with them, 57.4% were married couples living together, 10.6% had a female householder with no husband present, and 26.7% were non-families.