Home Postcode finder QLD Illinbah Illinbah postcode QLD Illinbah is a locality in Queensland covered by postcode 4275. Postcode 4275 State or territory Queensland (QLD) Region Gold Coast Add a free Illinbah business listing Be the first listing in Illinbah Common questionsWhat is the postcode for Illinbah?Illinbah, QLD has the postcode 4275.What state is Illinbah in?Illinbah is in Queensland (QLD).Does postcode 4275 cover more than one suburb?Yes. Postcode 4275 covers 11 localities, so the postcode alone does not identify Illinbah. Browse other postcodes in Queensland, or widen the search to every Australian postcode.