white-gum-valley postcode wa Home ›› Postcode Finder ›› WA ›› White-Gum-Valley White Gum Valley local listingsThe suburb of White Gum Valley is located in WA and has a postcode of 6162. Free white gum valley business listing! Get the first free listing in white gum valley! Search and find other Postcodes in Western Australia or widen the search to Postcodes in Australia.