A total of 4,000 acres were listed for sale in Carroll County, New Hampshire, recently, representing a total value of approximately $202 million in Carroll County farms and rural land for sale. Carroll County ranks first based on the combined acreage of land for sale among the 10 counties in the White Mountain State. Of all locations in Carroll County with land for sale, Conway had the most land for sale. Carroll County is one of the ten biggest counties in New Hampshire (993 square miles). It's located in the North New Hampshire region of the state.