Wauna is a census-designated place in Pierce County, Washington, United States. As of the 2020 census, Wauna had a population of 4,421.
Originally platted as Springfield on September 14, 1889, Wauna's name was changed at the government's request, because of the many Springfields in Washington. Wauna, a Native American term for mighty water, was chosen as the new name by an early post mistress, Mary Frances White.