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. Four vehicles in its collection, a streetcar and three steam locomotives, are listed on the National Register of Historic Places (NRHP). The approximately half-mile-long (0.8 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.