The Southwestern Arkansas and Indian Territory Railroad was a railroad in the U.S. state of Arkansas in the late 19th century.^[1] The 10-mile-long, 3 ft (914 mm) narrow gauge line opened in July 1887 as an extension between Smithton and Hebron in Cleveland County, Arkansas. The line was converted to 4 ft 8+1⁄2 in (1,435 mm) standard gauge in 1891.^[1]

The line was sold at foreclosure on 13 March 1900 after receivership was begun in March 1896, and reorganized on 28 April 1900 as the Arkansas Southwestern Railway Co.^[2]