Clay County is in Northwest Missouri. Of the 115 counties in the state, 261,548-acre Clay County ranks 111th by size. The most common type of land for sale by combined acreage in Clay County is residential property. Browse all waterfront property for sale in Clay 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!