Thornton, AR -- U.S. city in Arkansas Population (2000): 517 Housing Units (2000): 242 Land area (2000): 1.911972 sq. miles (4.951985 sq. km) Water area (2000): 0.017552 sq. miles (0.045460 sq. km) Total area (2000): 1.929524 sq. miles (4.997445 sq. km) FIPS code: 69050 Located within: Arkansas (AR), FIPS 05 Location: 33.776794 N, 92.489711 W ZIP Codes (1990): 71766 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Thornton, AR Thornton