There was a total of approximately $7 million of farms and ranches for sale in Columbia County, Washington, recently on Land.com. The total acreage of all Columbia County farms, ranches, hunting land and other land for sale was approximately 4,000 acres. Columbia County ranks 39th in the state for the total acreage of land currently advertised for sale. Among cities in Columbia County with farms, ranches, and rural real estate for sale, Dayton featured the most land for sale. Columbia County has a large agricultural economy, with 308 farms recorded in the county during the latest 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 biggest county (873 square miles) in Washington. It's located in the Eastern Washington region of Washington.