Home Postcode finder QLD Durham Downs Durham Downs postcode QLD Durham Downs is a locality in Queensland covered by postcode 4454. Postcode 4454 State or territory Queensland (QLD) Region Toowoomba Region Add a free Durham Downs business listing Be the first listing in Durham Downs Common questionsWhat is the postcode for Durham Downs?Durham Downs, QLD has the postcode 4454.What state is Durham Downs in?Durham Downs is in Queensland (QLD).Does postcode 4454 cover more than one suburb?Yes. Postcode 4454 covers 11 localities, so the postcode alone does not identify Durham Downs. Browse other postcodes in Queensland, or widen the search to every Australian postcode.