According to the Köppen Climate Classification system, Vashon has a warm-summer Mediterranean climate, abbreviated "Csb" on climate maps.
of 2000, there were 10,123 people, 4,193 households, and 2,838 families residing in the CDP.
Fishing was abundant in the cold saltwater of the Central Puget Sound Basin, which helped many Native American tribes to thrive here.
23.8% of all households were made up of individuals and 8.0% had someone living alone who was 65 years of age or older.According to the United States Census Bureau, the CDP has a total area of 37.0 square miles (96 square kilometres).To the west Vashon Island is separated from the Kitsap Peninsula by the Colvos Passage.During its operation, it was one of the leading colleges in the area. At that time, Vashon Island was separate from the neighboring Maury Island, but today the hamlet of Portage sits on an isthmus built in 1916 by local homeowners that connects the two.The First Native American Inhabitants Historical data from the era when the first Native Americans settled Vashon-Maury Island is limited.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.