Dubuque County is in Eastern Iowa. Of the 99 counties in the state, Dubuque County ranks 21st in terms of size (394,535 acres). The most common type of land for sale by combined acreage in Dubuque County is residential property. Browse all waterfront property for sale in Dubuque 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!