dumbleyung postcode wa Home ›› Postcode Finder ›› WA ›› Dumbleyung Dumbleyung local listingsThe suburb of Dumbleyung is located in WA and has a postcode of 6350. Free dumbleyung business listing! 1Dumbleyung Primary School49 Taylor St 08 98634068 View more business listings in dumbleyung Search and find other Postcodes in Western Australia or widen the search to Postcodes in Australia.