Home Postcode finder WA Treeton Treeton postcode WA Treeton is a locality in Western Australia covered by postcode 6284. Postcode 6284 State or territory Western Australia (WA) Region Wa Subs 3 Sth Rd Add a free Treeton business listing Be the first listing in Treeton Common questionsWhat is the postcode for Treeton?Treeton, WA has the postcode 6284.What state is Treeton in?Treeton is in Western Australia (WA).Does postcode 6284 cover more than one suburb?Yes. Postcode 6284 covers 4 localities, so the postcode alone does not identify Treeton. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.