Johnson County is in Eastern Iowa. Of the 99 counties in the Hawkeye State, Johnson County is 20th in terms of its size (623 square miles). The most common type of land for sale by combined acreage in Johnson County is homesite. Browse all waterfront property for sale in Johnson 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!