Land for sale in Iowa's Buena Vista County recently totaled approximately $7 million and approximately 1,000 acres. Buena Vista County ranks 78th out of 99 counties in the Hawkeye State for the total number of acres of land currently advertised for sale. Of all farms and ranches for sale in Buena Vista County, 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 Iowa.