Diamond City, AR -- U.S. city in Arkansas Population (2000): 730 Housing Units (2000): 547 Land area (2000): 2.675351 sq. miles (6.929126 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 2.675351 sq. miles (6.929126 sq. km) FIPS code: 18850 Located within: Arkansas (AR), FIPS 05 Location: 36.458880 N, 92.916280 W ZIP Codes (1990): Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Diamond City, AR Diamond City