Marion County is in Tallgrass Prairie Kansas. Of the 105 counties in the Sunflower State, Marion County ranks 20th in terms of size (953 square miles). The most common type of land for sale by combined acreage in Marion County is house. 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!