The Illinois Railway Museum is the largest railroad museum in the United States. It is located in the Chicago metropolitan area at 7000 Olson Road in Union, Illinois, 55 miles northwest of downtown Chicago.
Locale: Union, Illinois
Connections: Union Pacific Railroad
Built by: Elgin and Belvidere Electric Company
Original gauge: 4 ft 8¹⁄₂ in (1,435 mm) standard gauge