Double Oak, TX -- U.S. town in Texas Population (2000): 2179 Housing Units (2000): 709 Land area (2000): 2.175865 sq. miles (5.635463 sq. km) Water area (2000): 0.005154 sq. miles (0.013350 sq. km) Total area (2000): 2.181019 sq. miles (5.648813 sq. km) FIPS code: 21028 Located within: Texas (TX), FIPS 48 Location: 33.064331 N, 97.110690 W ZIP Codes (1990): Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Double Oak, TX Double Oak