Home Postcode finder WA Mount Melville Mount Melville postcode WA Mount Melville is a locality in Western Australia covered by postcode 6330. Postcode 6330 State or territory Western Australia (WA) Region Wa Subs 2 Gsr Add a free Mount Melville business listing Be the first listing in Mount Melville Common questionsWhat is the postcode for Mount Melville?Mount Melville, WA has the postcode 6330.What state is Mount Melville in?Mount Melville is in Western Australia (WA).Does postcode 6330 cover more than one suburb?Yes. Postcode 6330 covers 50 localities, so the postcode alone does not identify Mount Melville. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.