New Castle, Pennsylvania Area Code

New Castle, PA is officially utilizing an area code overlay in which area codes 724 and 878 serve the same geographic area. Ten digit dialing (area code + seven digit number) is necessary.

In addition to New Castle, PA area code information read more about area codes 724 and 878 details and Pennsylvania area codes.

New Castle, PA is located in Lawrence County and observes the Eastern Time Zone. View our Times by Area Code tool.