National Park is a borough in Gloucester County, New Jersey, United States. As of the 2010 United States Census, the borough's population was 3,036, reflecting a decline of 169 from the 3,205 counted in the 2000 Census, which had in turn declined by 208 from the 3,413 counted in the 1990 Census. Despite its name, National Park is neither a national park nor associated with one.