Tampico is a census-designated place and unincorporated community in Yakima County, Washington, United States, located approximately eighteen miles west of Yakima on Ahtanum Creek. As of the 2020 census, Tampico had a population of 467.
The community was named Tampico by pioneer cattleman A. D. Elgin, for a town in Mexico where he once lived. Early pioneers settled in Tampico by at least 1872. By 1887, there were from 16 to 20 families living in the community.
Chief KamiakinâÂÂwho led the Yakama, Palouse, and Klickitat in the Yakima WarâÂÂwas born at Ahtanum Creek near Tampico in 1800. Near that site, St. Joseph's Mission was built in 1852, to be subsequently destroyed and rebuilt more than once; services are still regularly performed there.
The community is served by West Valley School District 208.