Forest Park (formerly Harlem) is a village in Cook County, Illinois, a suburb of Chicago in United States. The population was 15,688 at the 2000 census. The Forest Park train stop on the CTA Blue Line is the line's western terminus, located on the Eisenhower Expressway at Des Plaines Avenue.
Forest Park is located at 41°52′23″N 87°48′40″W / 41.87306°N 87.81111°W / 41.87306; -87.81111 (41.873031, -87.811155).
As of the census of 2000, there were 15,688 people, 7,632 households, and 3,480 families residing in the village. The population density was 6,480.8 people per square mile (2,503.0/km²). There were 7,981 housing units at an average density of 3,297.0/sq mi (1,273.3/km²). The racial makeup of the village was 56.14% White, 31.18% African American, 0.15% Native American, 6.83% Asian, 0.07% Pacific Islander, 2.80% from other races, and 2.82% from two or more races. Hispanic or Latino of any race were 7.84% of the population, including 5.6% Mexican.