New Cumberland is a borough in easternmost Cumberland County, Pennsylvania, United States. New Cumberland was incorporated on March 21, 1831. The population was 7,277 at the 2010 census. The borough is noted for its historic downtown which includes landmarks like the historic West Shore Theater and the yearly Apple Festival, which gathers hundreds of vendors and thousands of visitors.
New Cumberland is part of the Harrisburg–Carlisle Metropolitan Statistical Area.
New Cumberland is located at 40°13′45″N 76°52′26″W (40.229140, -76.873992) and borders the western bank of the Susquehanna River in South Central Pennsylvania. It is bordered to the south by Yellow Breeches Creek, across which is York County and the Capital City Airport. To the west is Lower Allen Township, and to the north is the borough of Lemoyne. New Cumberland is situated along the southern edge of the Cumberland Valley.
Interstate 83 follows the western border of the borough, with access from Exit 40B (Simpson Ferry Road).
According to the United States Census Bureau, the borough has a total area of 1.68 square miles (4.36 km2), of which 1.68 square miles (4.34 km2) is land and 0.01 square miles (0.03 km2), or 0.62%, is water.
As of the census of 2000, there were 7,349 people, 3,301 households, and 2,016 families residing in the borough. The population density was 4,389.7 people per square mile (1,699.1/km²).