The Fort Smith Trolley Museum is a streetcar and railroad museum in Fort Smith, in the U.S. state of Arkansas, which includes an operating heritage streetcar line. The museum opened in 1985, and operation of its streetcar line began in 1991. Four vehicles in its collection, a streetcar and three steam locomotives, are listed on the National Register of Historic Places (NRHP). The now approximately three-quarters-mile-long (1.2 km) streetcar line also passes four NRHP-listed sites, including the Fort Smith National Historic Site, the Fort Smith National Cemetery, the West Garrison Avenue Historic District and the 1907 Atkinson-Williams Warehouse Building, which now houses the Fort Smith Museum of History.