Home Postcode finder WA Gwindinup Gwindinup postcode WA Gwindinup is a locality in Western Australia covered by postcode 6237. Postcode 6237 State or territory Western Australia (WA) Region Wa Subs 3 Sth Rd Add a free Gwindinup business listing Be the first listing in Gwindinup Common questionsWhat is the postcode for Gwindinup?Gwindinup, WA has the postcode 6237.What state is Gwindinup in?Gwindinup is in Western Australia (WA).Does postcode 6237 cover more than one suburb?Yes. Postcode 6237 covers 6 localities, so the postcode alone does not identify Gwindinup. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.