Vashon is a census-designated place (CDP) in King County, Washington, United States. It covers an island alternately called Vashon Island or Vashon-Maury Island, the largest island in Puget Sound south of Admiralty Inlet.
The island is connected to West Seattle and the Kitsap Peninsula via the Washington State Ferries system. The island has resisted the construction of a fixed bridge to preserve its relative isolation and rural character. Vashon Island is also known for its annual strawberry festival, sheepdog trials, and agriculture.
The population was 10,624 at the 2010 census and the size is 36.9 square miles (95.6 km2).
The median income for a household in the CDP was $58,261, and the median income for a family was $67,010. Males had a median income of $50,201 versus $36,426 for females. The per capita income for the island was $31,983. About 4.6% of families and 6.0% of the population were below the poverty line, including 5.2% of those under the age of 18 and 2.2% of those 65 and older.
Based on per capita income, Vashon ranks 32nd of 522 areas in the state of Washington to be ranked.