San Juan County, Washington
San Juan County | |
|---|---|
San Juan County Courthouse | |
| Motto: A World Away | |
Location within the U.S. state of Washington | |
Washington's location within the U.S. | |
| Coordinates: 48°34′N 122°58′W / 48.57°N 122.97°W | |
| Country | United States |
| State | Washington |
| Founded | October 31, 1873 |
| Named after | San Juan Islands |
| Seat | Friday Harbor |
| Largest town | Friday Harbor |
| Area | |
• Total | 621 sq mi (1,610 km2) |
| • Land | 174 sq mi (450 km2) |
| • Water | 447 sq mi (1,160 km2) 72% |
| Population (2020) | |
• Total | 17,788 |
• Estimate (2024) | 18,668 |
| • Density | 96/sq mi (37/km2) |
| Time zone | UTC−8 (Pacific) |
| • Summer (DST) | UTC−7 (PDT) |
| Congressional district | 2nd |
| Website | www |
San Juan County is a county in the Salish Sea in the far northwestern corner of the U.S. state of Washington. As of the 2020 census, its population was 17,788. The county seat and only incorporated town is Friday Harbor, on San Juan Island. The county was formed on October 31, 1873, from Whatcom County and is named for the San Juan Islands, which are in turn named for Juan Vicente de Güemes, 2nd Count of Revillagigedo, the Viceroy of New Spain.
Although the islands have no state highways, the ferry routes serving them are designated as part of the state highway system.