- HISTORIC SITES
- Alderbrook Farmhouse
- Krumdiack Homestead
- Roche Harbor
- San Juan County Courthouse
- San Juan Island National Historic Site
- Tharald Homestead
Photo: Friday Harbour Viewed from the VFW overlook. Photographed by User:Konrad Roeder (own work), 2007, [cc-by-3.0 (creativecommons.org/licenses/by/3.0)], via Wikimedia Commons, accessed January, 2013.
The San Juan County Courthouse administrative offices are located at 350 Court Street, Friday Harbor, WA 98250; phone: 360-378-2163.
The geography of San Juan County makes it a most unusual municipality. The county consists of 172 islands of the San Juan Archipelago. Located in Puget Sound between the mainland of Washington State and British Columbia's Vancouver Island, these small islands have never had a large population and historically have relied on a modest economy based on agriculture and fishing. 
- Harry Towne, Jean Thomas, Winifred Ruthroff, Jay Hurlbutt and Joann Blalock with Mark L. Brack, Theatre Group, Straights of Juan De Fuca, San Juan County Courthouse, Friday Harbor, Washington, nomination document, 1983, National Park Service, National Register of Historic Places, Washington, D.C.