Of 99 counties in the Cyclone State, Clayton County ranks fifth in terms of size (792 square miles). Clayton County is in Eastern Iowa. Recent listings of riverfront homes and property for sale in Iowa's Clayton County totals almost 1,000 acres and a combined market value of $500,000. The most common type of land for sale by combined acreage in Clayton County is residential property. Browse all waterfront property for sale in Clayton 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! The most common type of land for sale by combined acreage in Clayton County is residential property.