Of 99 counties in the Hawkeye State, Marion County ranks 55th in terms of size (570 square miles). Marion County is in Central Iowa. Recent Land Network data records approximately 1,000 acres of riverfront land and property for sale in Iowa's Marion County, which is valued at a combined $438,000. Browse all waterfront property for sale in Marion 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 Marion County is residential property.