New Wilmington is a borough in Lawrence County, Pennsylvania, United States, first platted in 1824 and established as a borough on April 9, 1873. The population was 2,452 at the 2000 census. It is home to Westminster College, and serves the Old Order Amish community in the surrounding Wilmington Township. New Wilmington apartments for rent comparison page shows most up to date rent information on New Wilmington apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.