Keystone, Island County, Washington

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Coordinates: 48°09′50″N 122°37′50″W / 48.16389°N 122.63056°W / 48.16389; -122.63056

Keystone is a small unincorporated community on Whidbey Island in Island County, Washington, in the northwestern United States.[1] It is near the Coupeville Ferry Landing, a dock for the Washington State Ferries route to Port Townsend that provides a maritime link for State Route 20 across Admiralty Inlet. It is located about 3 miles due south of Coupeville near Fort Casey State Park and Ebey's Prairie National Historic Preserve.


  1. ^ "Keystone". Geographic Names Information System. United States Geological Survey.