Old Ghan Heritage Railway and Museum, Railway museum in Alice Springs, Australia

The Old Ghan Heritage Railway and Museum is a railway museum at McDonnell Siding, 6.4 km south of Alice Springs, with a replica South Australian Railways station building. Its outdoor yard displays locomotives and carriages from the narrow-gauge Great Northern Railway and The Ghan, including German-built vehicles of 1951 from the re-gauged Trans-Australian.

The Ghan Preservation Society formed in 1981 at McDonnell Siding, 6.4 km south of Alice Springs, after the Central Australia Railway closed when the standard gauge line from Tarcoola opened in 1980. An $800,000 Australian Bicentennial Authority grant in 1987 funded a replica South Australian Railways station building, and a lease with the Australian National Railways Commission let tourist trains run from October 1988 over 25 km to Ewaninga Siding. Services stopped in 2001.

The name recalls the Afghan cameleers who supplied outback transport before the railway; the museum's collection focuses on the narrow-gauge Great Northern Railway and The Ghan. Outside stand vehicles used on the line, including German-built cars of 1951 from the re-gauged Trans-Australian that last ran in The Ghan.

The museum stands at McDonnell Siding, about 6.4 km south of Alice Springs, beside the old Great Northern Railway route through the MacDonnell Ranges pass. The narrow-gauge track south to Ewaninga Siding is out of service, so the locomotives and carriages are viewed as static displays. The adjacent National Road Transport Hall of Fame is run by the same society.

The German-built cars of 1951 came from the Trans-Australian after its re-gauging and last ran in The Ghan. They now stand among the static exhibits at McDonnell Siding, alongside a former WAGR W class steam locomotive and a Commonwealth Railways NSU class diesel.