emerald postcode qldst Home ›› Postcode Finder ›› QLDST ›› Emerald Emerald local listingsThe suburb of Emerald is located in QLD and has a postcode of 4720. Free emerald business listing! 1Emerald State High SchoolOld Airport Drive 07 498822222Capricornia School of Distance Education26 Gladstone St 07 498741553Marist CollegeJeppesen Dr 07 49823400 View more business listings in emerald Search and find other Postcodes in Queensland or widen the search to Postcodes in Australia.