Fairfield, WA -- U.S. town in Washington Population (2000): 494 Housing Units (2000): 194 Land area (2000): 0.628417 sq. miles (1.627592 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.628417 sq. miles (1.627592 sq. km) FIPS code: 22990 Located within: Washington (WA), FIPS 53 Location: 47.385618 N, 117.174002 W ZIP Codes (1990): 99012 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Fairfield, WA Fairfield