Rosenhayn is a census-designated place and unincorporated area located within Deerfield Township, in Cumberland County, New Jersey. It is part of the Vineland-Milleville- Bridgeton Primary Metropolitan Statistical Area for statistical purposes. As of the United States 2000 Census, the CDP population was 1,099. Rosenhayn apartments for rent comparison page shows most up to date rent information on Rosenhayn apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.