Natural Bridge is a town at the southwest edge of Winston County, Alabama, United States, located near the intersection of U.S. Highway 278 and Alabama Highway 13. The population was 28 at the 2000 census. For years, it has been the smallest populated town in Alabama, but the town is notable for the nearby rock arch, also named Natural Bridge, the longest natural bridge east of the Rockies, spanning over 127 ft (40 m).