Home Postcode finder QLD Horn Island Horn Island postcode QLD Horn Island is a locality in Queensland covered by postcode 4875. Postcode 4875 State or territory Queensland (QLD) Region North QLD Add a free Horn Island business listing More business listings in Horn Island Businesses in Horn IslandTagai State CollegeNawie St · 07 40692124 Common questionsWhat is the postcode for Horn Island?Horn Island, QLD has the postcode 4875.What state is Horn Island in?Horn Island is in Queensland (QLD).Does postcode 4875 cover more than one suburb?Yes. Postcode 4875 covers 17 localities, so the postcode alone does not identify Horn Island. Browse other postcodes in Queensland, or widen the search to every Australian postcode.