Home Postcode finder WA Upper Murray Upper Murray postcode WA Upper Murray is a locality in Western Australia covered by postcode 6390. Postcode 6390 State or territory Western Australia (WA) Region Wa Subs 2 Gsr Add a free Upper Murray business listing Be the first listing in Upper Murray Common questionsWhat is the postcode for Upper Murray?Upper Murray, WA has the postcode 6390.What state is Upper Murray in?Upper Murray is in Western Australia (WA).Does postcode 6390 cover more than one suburb?Yes. Postcode 6390 covers 11 localities, so the postcode alone does not identify Upper Murray. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.