Home Postcode finder WA Dumbleyung Dumbleyung postcode WA Dumbleyung is a locality in Western Australia covered by postcode 6350. Postcode 6350 State or territory Western Australia (WA) Region Wa Subs 2 Gsr Add a free Dumbleyung business listing More business listings in Dumbleyung Businesses in DumbleyungDumbleyung Primary School49 Taylor St · 08 98634068 Common questionsWhat is the postcode for Dumbleyung?Dumbleyung, WA has the postcode 6350.What state is Dumbleyung in?Dumbleyung is in Western Australia (WA).Does postcode 6350 cover more than one suburb?Yes. Postcode 6350 covers 3 localities, so the postcode alone does not identify Dumbleyung. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.