Of 10 counties in the White Mountain State, Rockingham County ranks sixth by size (795 square miles). Rockingham County is in South New Hampshire. New Hampshire's Rockingham County has almost 1,000 acres of farms for sale based on recent Land Network data. The combined market value of farms, hunting land and other rural land and acreage for sale here was $600,000. Browse all Rockingham County farms for sale on the Land Network to find the farm, cattle operation, hobby farm or other farm property that's right for your future business or lifestyle needs. The most common type of land for sale by combined acreage in Rockingham County is residential property.