Home Postcode finder WA Mount Walker Mount Walker postcode WA Mount Walker is a locality in Western Australia covered by postcode 6369. Postcode 6369 State or territory Western Australia (WA) Region Wa Subs 2 Gsr Add a free Mount Walker business listing Be the first listing in Mount Walker Common questionsWhat is the postcode for Mount Walker?Mount Walker, WA has the postcode 6369.What state is Mount Walker in?Mount Walker is in Western Australia (WA).Does postcode 6369 cover more than one suburb?Yes. Postcode 6369 covers 5 localities, so the postcode alone does not identify Mount Walker. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.