Home Postcode finder QLD Minnie Downs Minnie Downs postcode QLD Minnie Downs is a locality in Queensland covered by postcode 4478. Postcode 4478 State or territory Queensland (QLD) Region Toowoomba Region Add a free Minnie Downs business listing Be the first listing in Minnie Downs Common questionsWhat is the postcode for Minnie Downs?Minnie Downs, QLD has the postcode 4478.What state is Minnie Downs in?Minnie Downs is in Queensland (QLD).Does postcode 4478 cover more than one suburb?Yes. Postcode 4478 covers 10 localities, so the postcode alone does not identify Minnie Downs. Browse other postcodes in Queensland, or widen the search to every Australian postcode.