Etna, CA -- U.S. city in California Population (2000): 781 Housing Units (2000): 362 Land area (2000): 0.788999 sq. miles (2.043499 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.788999 sq. miles (2.043499 sq. km) FIPS code: 22972 Located within: California (CA), FIPS 06 Location: 41.457350 N, 122.896875 W ZIP Codes (1990): Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Etna, CA Etna