Home Postcode finder QLD Castle Creek Castle Creek postcode QLD Castle Creek is a locality in Queensland covered by postcode 4715. Postcode 4715 State or territory Queensland (QLD) Region Central QLD Add a free Castle Creek business listing Be the first listing in Castle Creek Common questionsWhat is the postcode for Castle Creek?Castle Creek, QLD has the postcode 4715.What state is Castle Creek in?Castle Creek is in Queensland (QLD).Does postcode 4715 cover more than one suburb?Yes. Postcode 4715 covers 11 localities, so the postcode alone does not identify Castle Creek. Browse other postcodes in Queensland, or widen the search to every Australian postcode.