Home Postcode finder WA Wallaroo Wallaroo postcode WA Wallaroo is a locality in Western Australia covered by postcode 6429. Postcode 6429 State or territory Western Australia (WA) Region Wa Subs 1 G Flds Add a free Wallaroo business listing Be the first listing in Wallaroo Common questionsWhat is the postcode for Wallaroo?Wallaroo, WA has the postcode 6429.What state is Wallaroo in?Wallaroo is in Western Australia (WA).Does postcode 6429 cover more than one suburb?Yes. Postcode 6429 covers 8 localities, so the postcode alone does not identify Wallaroo. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.