Home Postcode finder QLD Barron Barron postcode QLD Barron is a locality in Queensland covered by postcode 4878. Postcode 4878 State or territory Queensland (QLD) Region North QLD Add a free Barron business listing Be the first listing in Barron Common questionsWhat is the postcode for Barron?Barron, QLD has the postcode 4878.What state is Barron in?Barron is in Queensland (QLD).Does postcode 4878 cover more than one suburb?Yes. Postcode 4878 covers 6 localities, so the postcode alone does not identify Barron. Browse other postcodes in Queensland, or widen the search to every Australian postcode.