Walla Walla County is in Eastern Washington. Of the 39 counties in the Evergreen State, Walla Walla County is 26th in terms of its size (1,298 square miles). There is around 1,000 acres of residential land for sale in Walla Walla County, Washington, based on recent Land Network data. The combined market value of farms and ranches for sale here is around $22 million. The average price of residential land for sale in Walla Walla County was $670,309. Browse all residential land and rural property for sale in Washington to find residential land and properties that suit your lifestyle needs, from existing residential homes and estates to land ready for future residential-property development.