Home Postcode finder WA Kunjin Kunjin postcode WA Kunjin is a locality in Western Australia covered by postcode 6375. Postcode 6375 State or territory Western Australia (WA) Region Wa Subs 2 Gsr Add a free Kunjin business listing Be the first listing in Kunjin Common questionsWhat is the postcode for Kunjin?Kunjin, WA has the postcode 6375.What state is Kunjin in?Kunjin is in Western Australia (WA).Does postcode 6375 cover more than one suburb?Yes. Postcode 6375 covers 6 localities, so the postcode alone does not identify Kunjin. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.