There was a combined approximately $94 million of farmsand rural real estate for sale in Cumberland County recently on Land.com. The total acreage of all Cumberland County farms, rural land, hunting land and other land for sale was almost 2,000 acres. Cumberland County ranks sixth out of 21 counties in New Jersey for the combined amount of land currently advertised for sale. Of all farms, hunting land and other rural land and acreage for sale in Cumberland County, Millville had the most land for sale. Cumberland County is one of the ten largest counties in New Jersey (677 square miles). It's located in the South New Jersey region of the state.