Lavaca, AR -- U.S. city in Arkansas Population (2000): 1825 Housing Units (2000): 718 Land area (2000): 2.147190 sq. miles (5.561196 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 2.147190 sq. miles (5.561196 sq. km) FIPS code: 38890 Located within: Arkansas (AR), FIPS 05 Location: 35.336657 N, 94.176776 W ZIP Codes (1990): Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Lavaca, AR Lavaca