The value of all farms, ranches, and rural real estate for sale in Washington's Columbia County recently was $8 million, representing a total of 3,417 acres of land for sale in Columbia County. Columbia County ranks 39th out of 39 counties in the Evergreen State for the total number of acres of land currently advertised for sale. Of all locations in Columbia County with land and rural real estate for sale, Dayton featured the most land for sale. Its economy is defined as agricultural, with 308 farms recorded in the county during the most recent U.S. Census. Farming activities in Columbia County generate annual revenues of $3 million, most of which is from crops. Columbia County is the 31st largest county (873 square miles) in Washington. It's located in the Eastern Washington region of the state.