Tahuya is an unincorporated community in Mason County, Washington, United States. As of the 2020 census, the population of Belfair-Tahuya CCD was 9,439. It is located on the Hood Canal at the mouth of the Tahuya River. Tahuya, whose name comes from a Twana term meaning "that done", features a number of recreational areas. The ZIP Code f…Tahuya is an unincorporated community in Mason County, Washington, United States. As of the 2020 census, the population of Belfair-Tahuya CCD was 9,439. It is located on the Hood Canal at the mouth of the Tahuya River. Tahuya, whose name comes from a Twana term meaning "that done", features a number of recreational areas. The ZIP Code for Tahuya is 98588.