King County is in Puget Sound Washington. Of the 39 counties in the Evergreen State, King County ranks 11th in terms of size (1 million acres). There is 1,000 acres of residential land and property for sale in Washington's King County based on recent Land Network data, making it the most common type of land for sale in King County. The combined market value of farms, ranches, hunting land and other land for sale here is about $119 million. The average price of residential land for sale in King County was $2 million. 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.