The total value of farms, ranches, hunting land and other land for sale in Buena Vista County recently on Land.com was around $4 million. This represents around 1,000 acres of farms, ranches, hunting land and other land for sale in Buena Vista County. Buena Vista County ranks 90th out of 99 counties in Iowa for the total number of acres of land currently advertised for sale. Storm Lake featured the most land for sale. Buena Vista County is Iowa's 33rd largest county (580 square miles). It's located in the Western Iowa region of the state.