Auburn, CA -- U.S. city in California Population (2000): 12462 Housing Units (2000): 5457 Land area (2000): 7.373078 sq. miles (19.096184 sq. km) Water area (2000): 0.028289 sq. miles (0.073269 sq. km) Total area (2000): 7.401367 sq. miles (19.169453 sq. km) FIPS code: 03204 Located within: California (CA), FIPS 06 Location: 38.898671 N, 121.074399 W ZIP Codes (1990): 95603 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Auburn, CA Auburn