Cathlamet, WA -- U.S. town in Washington Population (2000): 565 Housing Units (2000): 278 Land area (2000): 0.396162 sq. miles (1.026056 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.396162 sq. miles (1.026056 sq. km) FIPS code: 10635 Located within: Washington (WA), FIPS 53 Location: 46.203767 N, 123.383838 W ZIP Codes (1990): 98612 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Cathlamet, WA Cathlamet