Museum site and structures The Illinois Railway Museum property covers more than , the most extensive physical plant of any rail museum in North America. In 2009, the museum bought another of adjacent land as a buffer against development. The main campus is located at . In addition to the museum's revenue trackage, the main campus in Union includes: • 11 equipment storage barns with a total of of track under cover. • Two additional garages housing trolleybuses and motor buses. • A dedicated steam restoration shop. • A former
Chicago and North Western railway depot from
Marengo, Illinois, built in 1851. • A complete
Chicago Rapid Transit Company ground-level station (
50th Avenue station, closed by
CTA in 1978) • Five streetcar stations of varying design. • Several restored and functional neon signs and concrete
entablatures on display. • An indoor dining facility built in 2003. (open seasonally) • The Multi-purpose Building completed in 2021 housing the Model Railroad Display, the Revolving Exhibit Gallery, the Pullman Archive, and the Milwaukee Road Historic Association. • A
turntable from the
Union Pacific Railroad's Burnham Shops. • Seven railroad crossings and thirteen signals, with five
wigwags. Two of the five wigwags are upper-quadrant wigwags from the
Magnetic Signal Company, one from the
Union Switch & Signal, and the other two are lower quadrant wigwag from the Western Railroad Supply Company. The other two crossings are from the
Griswold Signal Company. IRM also owns one off-site library; the Strahorn Research Library in downtown Marengo. The Pullman Archive, formerly located in downtown Union, IL moved on campus to the Multi-purpose Building in 2021. == Organization ==