Jackson, CA -- U.S. city in California Population (2000): 3989 Housing Units (2000): 1859 Land area (2000): 3.512054 sq. miles (9.096179 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 3.512054 sq. miles (9.096179 sq. km) FIPS code: 36980 Located within: California (CA), FIPS 06 Location: 38.350688 N, 120.773762 W ZIP Codes (1990): 95642 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Jackson, CA Jackson