San Juan Island

San Juan Island is the second-largest and most populous of the San Juan Islands in northwestern Washington, United States. It has a land area of 142.59 km (55.053 sq mi) and a population of 8,632 as of the 2020 census.

Washington State Ferries serves Friday Harbor, which is San Juan Island's major population center, the San Juan Countyseat, and the only incorporated town in the islands.