Cowlitz County is in Southwest Washington. Of the 39 counties in the Evergreen State, 1,166-square-mile Cowlitz County ranks 29th by size. The most common type of land for sale by combined acreage in Cowlitz County is residential property. Browse all waterfront property for sale in Cowlitz 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!