Folsom, CA -- U.S. city in California Population (2000): 51884 Housing Units (2000): 17968 Land area (2000): 21.738669 sq. miles (56.302892 sq. km) Water area (2000): 2.437211 sq. miles (6.312346 sq. km) Total area (2000): 24.175880 sq. miles (62.615238 sq. km) FIPS code: 24638 Located within: California (CA), FIPS 06 Location: 38.672127 N, 121.157838 W ZIP Codes (1990): Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Folsom, CA Folsom