Land for sale in Shelby County recently totaled nearly $7 million and nearly 1,000 acres. Shelby County ranks 74th in Iowa for the total number of acres of land currently advertised for sale. Of all farms, ranches, hunting land and other land for sale in Shelby County, Harlan had the most land for sale. Shelby County is the 25th biggest county (591 square miles) in Iowa. It's located in the Western Iowa region of the state.