Home Postcode finder WA Marne Marne postcode WA Marne is a locality in Western Australia covered by postcode 6608. Postcode 6608 State or territory Western Australia (WA) Region Wa Subs 4 Coast Add a free Marne business listing Be the first listing in Marne Common questionsWhat is the postcode for Marne?Marne, WA has the postcode 6608.What state is Marne in?Marne is in Western Australia (WA).Does postcode 6608 cover more than one suburb?Yes. Postcode 6608 covers 3 localities, so the postcode alone does not identify Marne. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.