|San Juan County Washington Cities/Towns - Eastsound, Friday Harbor (County Seat), Olga, Orcas
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San Juan County is an archipelagic county located in the U.S. state of Washington, composed of most of the San Juan Islands. As of 2000, the population was 14,077. The county seat is Friday Harbor.
San Juan County was created out of Whatcom County on October 31, 1873. It is named after San Juan Island, which was named after St. John the Baptist (San Juan Bautista) by its European discoverer, Spanish explorer Francisco de Eliza, in 1791.