Lamar, AR -- U.S. city in Arkansas Population (2000): 1415 Housing Units (2000): 585 Land area (2000): 4.355428 sq. miles (11.280506 sq. km) Water area (2000): 0.009015 sq. miles (0.023348 sq. km) Total area (2000): 4.364443 sq. miles (11.303854 sq. km) FIPS code: 38290 Located within: Arkansas (AR), FIPS 05 Location: 35.440546 N, 93.392764 W ZIP Codes (1990): 72846 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Lamar, AR Lamar