There was a total of around $81 million of farmsand rural real estate for sale in Duplin County, North Carolina, recently on Land.com. The total acreage of all Duplin County land for sale was 5,000 acres. Duplin County ranks 49th out of 100 counties in the state for the combined amount of land currently advertised for sale. Among cities in Duplin County with farms, rural land, hunting land and other land for sale, Wallace featured the most land for sale. Manufacturing and related services are the largest economic sectors in Duplin County. Duplin County is North Carolina's 13th largest county (820 square miles). It's located in the Coast North Carolina region of the state.