Mission, TX -- U.S. city in Texas Population (2000): 45408 Housing Units (2000): 17723 Land area (2000): 24.128675 sq. miles (62.492979 sq. km) Water area (2000): 0.007331 sq. miles (0.018988 sq. km) Total area (2000): 24.136006 sq. miles (62.511967 sq. km) FIPS code: 48768 Located within: Texas (TX), FIPS 48 Location: 26.211402 N, 98.321277 W ZIP Codes (1990): Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Mission, TX Mission