Of 44 counties in the Gem State, Franklin County ranks 37th by size (667 square miles). Franklin County is in Southeastern Idaho. There is about 1,000 acres of riverfront homes and property for sale in Franklin County, Idaho, based on recent Land Network data. The combined market value of land for sale here is about $400,000. Browse all waterfront property for sale in Franklin 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 Franklin County is residential property.