Liberty Hill, TX -- U.S. city in Texas Population (2000): 1409 Housing Units (2000): 494 Land area (2000): 1.907312 sq. miles (4.939915 sq. km) Water area (2000): 0.008894 sq. miles (0.023036 sq. km) Total area (2000): 1.916206 sq. miles (4.962951 sq. km) FIPS code: 42664 Located within: Texas (TX), FIPS 48 Location: 30.664219 N, 97.911261 W ZIP Codes (1990): 78642 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Liberty Hill, TX Liberty Hill