Home Postcode finder WA East Augusta East Augusta postcode WA East Augusta is a locality in Western Australia covered by postcode 6290. Postcode 6290 State or territory Western Australia (WA) Region Wa Subs 3 Sth Rd Add a free East Augusta business listing Be the first listing in East Augusta Common questionsWhat is the postcode for East Augusta?East Augusta, WA has the postcode 6290.What state is East Augusta in?East Augusta is in Western Australia (WA).Does postcode 6290 cover more than one suburb?Yes. Postcode 6290 covers 6 localities, so the postcode alone does not identify East Augusta. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.