What are the Newtown, Pennsylvania Zip Codes for 2020, 2019Primary Zip Codes for NewtownZip CodePrimary CitySecondary City18940NewtownNewtown, Wrightstown, George School, Upper Makefield, Upr MakefieldCities sharing Zip Codes with NewtownZip CodePrimary CitySecondary CityMore Information18940NewtownGeorge School18940NewtownUpper Makefield18940NewtownUpr Makefield18940NewtownWrightstownAdvertisements