Home Postcode finder WA Marmion Marmion postcode WA Marmion is a locality in Western Australia covered by postcode 6020. Postcode 6020 State or territory Western Australia (WA) Region Wa Subs 2 Gsr Add a free Marmion business listing More business listings in Marmion Businesses in MarmionMarmion Primary School7 Cliverton Ct · 08 92463422 Common questionsWhat is the postcode for Marmion?Marmion, WA has the postcode 6020.What state is Marmion in?Marmion is in Western Australia (WA).Does postcode 6020 cover more than one suburb?Yes. Postcode 6020 covers 5 localities, so the postcode alone does not identify Marmion. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.