Home Postcode finder QLD Caboonbah Caboonbah postcode QLD Caboonbah is a locality in Queensland covered by postcode 4312. Postcode 4312 State or territory Queensland (QLD) Region Western Suburbs Add a free Caboonbah business listing Be the first listing in Caboonbah Common questionsWhat is the postcode for Caboonbah?Caboonbah, QLD has the postcode 4312.What state is Caboonbah in?Caboonbah is in Queensland (QLD).Does postcode 4312 cover more than one suburb?Yes. Postcode 4312 covers 13 localities, so the postcode alone does not identify Caboonbah. Browse other postcodes in Queensland, or widen the search to every Australian postcode.