Washington County is in Green Country Oklahoma. Of the 77 counties in the Sooner State, Washington County ranks 77th in terms of size (424 square miles). Recent Land Network data totals about 2,000 acres of undeveloped land for sale in Oklahoma's Washington County, which is valued at a combined $15 million. The average price of undeveloped acreage for sale in Washington County was $219,118. Some suggested uses for undeveloped land currently for sale in Washington County include for hunting/fishing, commercial, and homestead use. Some common wildlife species to be found on undeveloped land for sale in Washington County include whitetail deer, turkey, pig, deer and dove. Current commercial applications for commercial property for sale in Washington County include for hunting/fishing, commercial and homestead use. Browse all Oklahoma undeveloped land for sale on the Land Network to find your next commercial property or land investment.