What are the Knoxville, Pennsylvania Zip Codes for 2020, 2019Primary Zip Codes for KnoxvilleZip CodePrimary CitySecondary City16928KnoxvilleKnoxville, Austinburg, DeerfieldCities sharing Zip Codes with KnoxvilleZip CodePrimary CitySecondary CityMore Information16928KnoxvilleAustinburg16928KnoxvilleDeerfieldAdvertisements