Sandia, TX -- U.S. Census Designated Place in Texas Population (2000): 431 Housing Units (2000): 158 Land area (2000): 0.967881 sq. miles (2.506799 sq. km) Water area (2000): 0.004309 sq. miles (0.011160 sq. km) Total area (2000): 0.972190 sq. miles (2.517959 sq. km) FIPS code: 65168 Located within: Texas (TX), FIPS 48 Location: 28.019507 N, 97.878652 W ZIP Codes (1990): 78383 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Sandia, TX Sandia