Of 10 counties in the Granite State, Rockingham County ranks sixth by size (795 square miles). Rockingham County is in South New Hampshire. There is around 1,000 acres of lakefront homes and property for sale in Rockingham County, New Hampshire, based on recent Land Network data. The combined market value of farms, hunting land and other rural land and acreage for sale here is $2 million. Browse all waterfront property for sale in Rockingham 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 Rockingham County is house.