There was a combined $159 million of farms, hunting land and other rural land and acreage for sale in Hillsborough County, New Hampshire, recently on Land.com. The total size of all Hillsborough County land for sale was almost 2,000 acres. Hillsborough County ranks sixth out of 10 counties in New Hampshire for the combined amount of land currently advertised for sale. Of all farms, rural land, hunting land and other land for sale in Hillsborough County, Hillsborough featured the most land for sale. Hillsborough County is one of the ten largest counties in New Hampshire (892 square miles). It's located in the South New Hampshire region of New Hampshire.