What are the Thornhurst, Pennsylvania Zip Codes for 2019, 2018Primary Zip Codes for ThornhurstZip CodePrimary CitySecondary City18424GouldsboroThornhurst, Moscow, Clifton, Clifton Township, Clifton Twp, Covington Township, Covington Twp,Cities sharing Zip Codes with ThornhurstZip CodePrimary CitySecondary CityMore Information18424GouldsboroClifton18424GouldsboroClifton Township18424GouldsboroClifton Twp18424GouldsboroCovington Township18424GouldsboroCovington Twp18424GouldsboroThornhurst18424GouldsboroMoscowRelevant Related Information