mullalyup postcode wa Home ›› Postcode Finder ›› WA ›› Mullalyup Mullalyup local listingsThe suburb of Mullalyup is located in WA and has a postcode of 6252. Free mullalyup business listing! Get the first free listing in mullalyup! Search and find other Postcodes in Western Australia or widen the search to Postcodes in Australia.