Newport is an unincorporated community and census-designated place located within Downe Township in Cumberland County, in the U.S. state of New Jersey. The area is served as United States Postal Service ZIP Code 08345. As of the 2000 United States Census, the population for ZIP Code Tabulation Area 08345 was 834.Newport is a very rural community, with colonial, craftsman, and Victorian style homes. County Route 553 is the main road that runs through Newport.