Home Postcode finder WA Westwood Westwood postcode WA Westwood is a locality in Western Australia covered by postcode 6316. Postcode 6316 State or territory Western Australia (WA) Region Wa Subs 2 Gsr Add a free Westwood business listing Be the first listing in Westwood Common questionsWhat is the postcode for Westwood?Westwood, WA has the postcode 6316.What state is Westwood in?Westwood is in Western Australia (WA).Does postcode 6316 cover more than one suburb?Yes. Postcode 6316 covers 6 localities, so the postcode alone does not identify Westwood. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.