Home Postcode finder QLD Closeburn Closeburn postcode QLD Closeburn is a locality in Queensland covered by postcode 4520. Postcode 4520 State or territory Queensland (QLD) Region Moreton Add a free Closeburn business listing Be the first listing in Closeburn Common questionsWhat is the postcode for Closeburn?Closeburn, QLD has the postcode 4520.What state is Closeburn in?Closeburn is in Queensland (QLD).Does postcode 4520 cover more than one suburb?Yes. Postcode 4520 covers 18 localities, so the postcode alone does not identify Closeburn. Browse other postcodes in Queensland, or widen the search to every Australian postcode.