Decatur, AR -- U.S. city in Arkansas Population (2000): 1314 Housing Units (2000): 535 Land area (2000): 2.293365 sq. miles (5.939789 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 2.293365 sq. miles (5.939789 sq. km) FIPS code: 17740 Located within: Arkansas (AR), FIPS 05 Location: 36.337541 N, 94.456721 W ZIP Codes (1990): 72722 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Decatur, AR Decatur