Grays Harbor County is in Olympic Peninsula Washington. Of the 39 counties in the Evergreen State, Grays Harbor County ranks 13th in terms of size (1 million acres). The most common type of land for sale by combined acreage in Grays Harbor County is undeveloped land. Browse all waterfront property for sale in Grays Harbor County on the Land Network to find the marina, lakefront and other recreational property that meets your needs, from waterside land perfect as a retirement investment to existing residential waterfront land and property for hunting, fishing and other outdoor-recreation pursuits!