Home Postcode finder QLD Mount Walker West Mount Walker West postcode QLD Mount Walker West is a locality in Queensland covered by postcode 4340. Postcode 4340 State or territory Queensland (QLD) Region Western Suburbs Add a free Mount Walker West business listing Be the first listing in Mount Walker West Common questionsWhat is the postcode for Mount Walker West?Mount Walker West, QLD has the postcode 4340.What state is Mount Walker West in?Mount Walker West is in Queensland (QLD).Does postcode 4340 cover more than one suburb?Yes. Postcode 4340 covers 18 localities, so the postcode alone does not identify Mount Walker West. Browse other postcodes in Queensland, or widen the search to every Australian postcode.