There was a combined nearly $94 million of farms, hunting land and other rural land and acreage for sale in New Jersey's Cumberland County recently on Land.com. The total size of all Cumberland County farms and rural land for sale was 2,000 acres. Cumberland County ranks eighth in New Jersey for the combined amount of land currently advertised for sale. Of all farms and rural real estate for sale in Cumberland County, Millville featured the most land for sale. Cumberland County is one of the ten biggest counties in New Jersey (677 square miles). It's located in the South New Jersey region of the state.