What are the Irwin, Pennsylvania Zip Codes for 2020, 2019Primary Zip Codes for IrwinZip CodePrimary CitySecondary City15642IrwinIrwin, N Huntingdon, No Huntingdon, North Huntingdon, NorthCities sharing Zip Codes with IrwinZip CodePrimary CitySecondary CityMore Information15642IrwinN Huntingdon15642IrwinNo Huntingdon15642IrwinNorth Huntingdon15642IrwinNorth IrwinAdvertisements