Of 44 counties in the state, Adams County is 22nd in terms of its size (1,369 square miles). Adams County is in Southwestern Idaho. The total value of 1,000 acres of riverfront homes and property recently listed for sale in Adams County, Idaho, was approximately $2 million. Browse all waterfront property for sale in Adams 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 Adams County is house.