Home Postcode finder WA Buckland Buckland postcode WA Buckland is a locality in Western Australia covered by postcode 6401. Postcode 6401 State or territory Western Australia (WA) Region Wa Subs 1 G Flds Add a free Buckland business listing Be the first listing in Buckland Common questionsWhat is the postcode for Buckland?Buckland, WA has the postcode 6401.What state is Buckland in?Buckland is in Western Australia (WA).Does postcode 6401 cover more than one suburb?Yes. Postcode 6401 covers 18 localities, so the postcode alone does not identify Buckland. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.