marmion postcode wa Home ›› Postcode Finder ›› WA ›› Marmion Marmion local listingsThe suburb of Marmion is located in WA and has a postcode of 6020. Free marmion business listing! 1Marmion Primary School7 Cliverton Ct 08 92463422 View more business listings in marmion Search and find other Postcodes in Western Australia or widen the search to Postcodes in Australia.