Retail, healthcare, and light manufacturing, with many residents commuting to Pittsburgh for work. Potential Alternatives If "156421" was a typo, you might be looking for: 15642 : Irwin, PA (the most likely intent). 16421 : A ZIP Code in Erie County, PA .
Served by U.S. Route 30 and the Pennsylvania Turnpike (I-76), which has an exit in the area. 156421 zip
If you are looking for information about the 5-digit ZIP Code , 15642 ZIP Code: Irwin, PA and light manufacturing