Home Postcode finder QLD Green Island Green Island postcode QLD Green Island is a locality in Queensland covered by postcode 4871. Postcode 4871 State or territory Queensland (QLD) Region North QLD Add a free Green Island business listing Be the first listing in Green Island Common questionsWhat is the postcode for Green Island?Green Island, QLD has the postcode 4871.What state is Green Island in?Green Island is in Queensland (QLD).Does postcode 4871 cover more than one suburb?Yes. Postcode 4871 covers 103 localities, so the postcode alone does not identify Green Island. Browse other postcodes in Queensland, or widen the search to every Australian postcode.