Home Postcode finder WA Wiluna Wiluna postcode WA Wiluna is a locality in Western Australia covered by postcode 6646. Postcode 6646 State or territory Western Australia (WA) Region North West Suburbs Add a free Wiluna business listing More business listings in Wiluna Businesses in WilunaWiluna Remote Community School77 Wotton St · 08 99817013 Common questionsWhat is the postcode for Wiluna?Wiluna, WA has the postcode 6646.What state is Wiluna in?Wiluna is in Western Australia (WA).Does postcode 6646 cover more than one suburb?Yes. Postcode 6646 covers 3 localities, so the postcode alone does not identify Wiluna. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.