Park Forest is a village located south of Chicago in Cook County, Illinois, with a small southern portion in Will County, Illinois, United States. The village was originally designed by Loebl Schlossman& Bennett as a planned community for veterans returning from World War II. As of the 2020 census, the village had a population of 21,687. Park Forest is bordered by Olympia Fields to the north, Chicago Heights to the east, University Park to the south, and Richton Park and Matteson to the west.