The value of all land for sale in New York's Washington County recently was nearly $69 million, representing a total of 4,631 acres of land for sale in Washington County. Washington County ranks 34th in the Empire State for the total acreage of land currently advertised for sale. Of all land and rural real estate for sale in Washington County, Whitehall featured the most land for sale. Government and state-level services are the main economic drivers in Washington County. Washington County is New York's 27th biggest county (845 square miles). It's located in the Central New York region of the state.