San Juan County is located in Washington. The county covers 621 square miles (397,498 acres), representing less than one percent of the state. Of Washington's 39 counties, San Juan County ranks 32nd in terms of the size of its population (16,252, according to 2015 Census estimates). Based on its natural assets, tourism and recreation define the economic landscape of San Juan County. Recent Lands of America data places the average value of land for sale in San Juan County at $55,263 per acre. The average list price of property and land for sale was $4,200,000 and the median land-parcel size was 76 acres. Land for sale in San Juan County totaled 76 acres and $4.2 million in overall land value. With a recreation- and tourism-dependent economy, recreational acreage and property, as well as hunting lands, are most commonly sold in San Juan County.