Home Postcode finder WA Dukin Dukin postcode WA Dukin is a locality in Western Australia covered by postcode 6475. Postcode 6475 State or territory Western Australia (WA) Region Wa Subs 1 G Flds Add a free Dukin business listing Be the first listing in Dukin Common questionsWhat is the postcode for Dukin?Dukin, WA has the postcode 6475.What state is Dukin in?Dukin is in Western Australia (WA).Does postcode 6475 cover more than one suburb?Yes. Postcode 6475 covers 7 localities, so the postcode alone does not identify Dukin. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.