Grays Harbor County is in Olympic Peninsula Washington. Of the 39 counties in the Evergreen State, 2,223-square-mile Grays Harbor County ranks 13th by size. Recent listings of residential land and property for sale in Grays Harbor County, Washington, totals roughly 1,000 acres and a combined market value of around $19 million. The most common type of land for sale by combined acreage in Grays Harbor County is undeveloped land. The average price of residential land for sale in Grays Harbor County was $944,835. 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.