dumbarton postcode wa Home ›› Postcode Finder ›› WA ›› Dumbarton Dumbarton local listingsThe suburb of Dumbarton is located in WA and has a postcode of 6566. Free dumbarton business listing! 1Vernice Pty Ltd6 Extracts Place, Dumbarton WA 6566, Australia 0400750683 View more business listings in dumbarton Search and find other Postcodes in Western Australia or widen the search to Postcodes in Australia.