River Forest is a suburban village in Cook County, Illinois, United States. Two universities make their home in River Forest, Dominican University and Concordia University Chicago. The village is closely tied to the larger neighboring community of Oak Park, Illinois. There are significant architectural designs located in River Forest such as the Winslow House by Frank Lloyd Wright. The population was 11,635 at the 2000 census. River Forest has a railroad station with service to Chicago on Metra's Union Pacific/West Line.