great-keppel-island postcode qld Home ›› Postcode Finder ›› QLD ›› Great-Keppel-Island Great Keppel Island local listingsThe suburb of Great Keppel Island is located in QLD and has a postcode of 4700. Free great keppel island business listing! Get the first free listing in great keppel island! Search and find other Postcodes in Queensland or widen the search to Postcodes in Australia.