Land for sale in Washington's Jefferson County recently totaled almost $45 million and almost 1,000 acres. Jefferson County ranks 34th out of 39 counties in the state for the combined amount of land currently advertised for sale. Of all locations in Jefferson County with farms and ranches for sale, Port Townsend had the most land for sale. Based on its natural assets, tourism and recreation contribute significant revenue toward Jefferson County's overall GDP. Jefferson County is Washington's 15th largest county (2,187 square miles). It's located in the Olympic Peninsula Washington region of Washington.