Belmont, CA -- U.S. city in California Population (2000): 25123 Housing Units (2000): 10577 Land area (2000): 4.525749 sq. miles (11.721636 sq. km) Water area (2000): 0.008201 sq. miles (0.021240 sq. km) Total area (2000): 4.533950 sq. miles (11.742876 sq. km) FIPS code: 05108 Located within: California (CA), FIPS 06 Location: 37.518087 N, 122.291673 W ZIP Codes (1990): 94002 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Belmont, CA Belmont