Home Postcode finder WA Juna Downs Juna Downs postcode WA Juna Downs is a locality in Western Australia covered by postcode 6751. Postcode 6751 State or territory Western Australia (WA) Region North West Suburbs Add a free Juna Downs business listing Be the first listing in Juna Downs Common questionsWhat is the postcode for Juna Downs?Juna Downs, WA has the postcode 6751.What state is Juna Downs in?Juna Downs is in Western Australia (WA).Does postcode 6751 cover more than one suburb?Yes. Postcode 6751 covers 10 localities, so the postcode alone does not identify Juna Downs. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.