Southlake, TX -- U.S. city in Texas Population (2000): 21519 Housing Units (2000): 6614 Land area (2000): 21.892115 sq. miles (56.700316 sq. km) Water area (2000): 0.554907 sq. miles (1.437202 sq. km) Total area (2000): 22.447022 sq. miles (58.137518 sq. km) FIPS code: 69032 Located within: Texas (TX), FIPS 48 Location: 32.946678 N, 97.145230 W ZIP Codes (1990): Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Southlake, TX Southlake