West Mifflin, Pennsylvania Area Code
West Mifflin, PA is officially utilizing an area code overlay in which area codes 412 and 878 serve the same geographic area. Ten digit dialing (area code + seven digit number) is necessary.
In addition to West Mifflin, PA area code information read more about area codes 412 and 878 details and Pennsylvania area codes.
West Mifflin, PA is located in Allegheny County and observes the Eastern Time Zone. View our Times by Area Code tool.