The value of all farms and rural land for sale in New Jersey's Sussex County recently was $165 million, representing a total of 1,625 acres of land for sale in Sussex County. Sussex County ranks third out of 21 counties in the state for the total number of acres of land currently advertised for sale. Fredon had the most land for sale. Sussex County is one of the ten biggest counties in New Jersey (535 square miles). It's located in the North New Jersey region of New Jersey.