Home Postcode finder QLD Saibai Island Saibai Island postcode QLD Saibai Island is a locality in Queensland covered by postcode 4875. Postcode 4875 State or territory Queensland (QLD) Region North QLD Add a free Saibai Island business listing Be the first listing in Saibai Island Common questionsWhat is the postcode for Saibai Island?Saibai Island, QLD has the postcode 4875.What state is Saibai Island in?Saibai 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 Saibai Island. Browse other postcodes in Queensland, or widen the search to every Australian postcode.