Vashon is a census-designated place (CDP) in King County, Washington, United States.The population was 10,624 at the 2010 census.
There is evidence of human activity on Vashon Island dating back to the last 10-12,000 years. Some of the Native peoples known to have lived on Vashon Island were the Marpole from about 7,000 years ago, the Salish about 1,000 years ago and the S'Homamish starting about 500 years ago.The island was named on May 28, 1792, by the explorer George Vancouver after his friend James Vashon of the Royal Navy. Starting in 1824, different explorer and settler groups stayed on Vashon Island.In 1890, Vashon Islanders started growing strawberries for sale. This became an important part of the Island economy during the next fifty years.