A total of 1,000 acres were listed for sale in Washington County recently, representing a combined around $4 million in Washington County land for sale. Washington County ranks 92nd out of 105 counties in Kansas for the total number of acres of land currently advertised for sale. Morrowville had the most land for sale. Washington County has a large agricultural economy, with 732 farms recorded in the county during the latest U.S. Census. Farming activities in Washington County generate annual revenues of $10 million, most of which is from crops. Washington County is the 30th largest county (898 square miles) in Kansas. It's located in the Tallgrass Prairie Kansas region of the state.