New Cumberland is a borough in Cumberland County, Pennsylvania, United States. New Cumberland was incorporated as a borough on March 21, 1831. The population was 7,349 at the 2000 census. The borough is noted for its yearly Apple Festival, which gathers hundreds of vendors and tens of thousands of visitors. New Cumberland apartments for rent comparison page shows most up to date rent information on New Cumberland apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.