Tustin, CA -- U.S. city in California Population (2000): 67504 Housing Units (2000): 25501 Land area (2000): 11.399955 sq. miles (29.525747 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 11.399955 sq. miles (29.525747 sq. km) FIPS code: 80854 Located within: California (CA), FIPS 06 Location: 33.739618 N, 117.813533 W ZIP Codes (1990): 92680 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Tustin, CA Tustin