San Juan Islands National Wildlife Refuge, Wildlife sanctuary in San Juan County, United States.

The San Juan Islands National Wildlife Refuge is a federal refuge made up of over 80 small, uninhabited islands scattered across the Salish Sea in San Juan County, Washington State. Most of the islands consist of rocky shorelines, low scrub, and open rock surfaces that provide habitat for seabirds and marine mammals.

The refuge was created in 1976, when 83 small uninhabited islands in the San Juans were brought together under U.S. Fish and Wildlife Service management as part of the Washington Maritime National Wildlife Refuge Complex. In the same year, all but three of the islands were also designated wilderness within the San Juan Wilderness, covering 353 acres. The sources do not mention a 1914 Smith Island refuge or a merger of earlier protected areas.

Recreation here is limited to watching wildlife from a distance: boaters are asked to keep 200 yards from the wilderness islands, and public entry is barred except on Matia Island, reached by a cove with a dock. Matia holds a 5-acre campground and a 1-mile trail through the wilderness. Around 200 bird species visit each year, among them puffins, guillemots, auklets, oystercatchers and bald eagles.

Boats and kayaks must stay roughly 180 meters (200 yards) from the shoreline of most islands to avoid disturbing wildlife, so planning a water-based visit means keeping a respectful distance. Only Matia Island allows landing, with a short trail and a campsite available for those who want to stay overnight.

Matia Island is the exception to the refuge's no-landing rule: a cove with a dock gives access to a 5-acre campground and a 1-mile trail through the wilderness. Turn Island and five acres of Matia are run jointly with Washington State Parks, while Smith Island and Minor Island are also excluded from the wilderness designation.