Friday Harbor is a town in San Juan County, Washington, United States. Located on San Juan Island, it is the major commercial center of the San Juan Islands archipelago. It is the county seat of San Juan County.
Friday Harbor's primary connection to the mainland is via Washington State Ferries, which sail between the town and Anacortes, Washington several times per day, and the Friday Harbor Airport, which has limited airline service. Friday Harbor is also served by float plane.
On the island, there are taxis, shuttles, bicycles and mopeds for rent.
The town of Friday Harbor houses the world famous marine biology facility, Friday Harbor Laboratories, a field station of the University of Washington. The town has several schools, including the public Friday Harbor High School, Friday Harbor Middle School, and Friday Harbor Elementary School that are part of the San Juan Island School District; and the private Stillpoint School, Paideia School, and Spring Street School. Also on the island is a branch of Skagit Valley College. The school district also includes the small Stuart Island Elementary School that was established in 1897 and is one of Washington's "remote and necessary" schools.