Home Postcode finder WA Holleton Holleton postcode WA Holleton is a locality in Western Australia covered by postcode 6426. Postcode 6426 State or territory Western Australia (WA) Region Wa Subs 1 G Flds Add a free Holleton business listing Be the first listing in Holleton Common questionsWhat is the postcode for Holleton?Holleton, WA has the postcode 6426.What state is Holleton in?Holleton is in Western Australia (WA).Does postcode 6426 cover more than one suburb?Yes. Postcode 6426 covers 14 localities, so the postcode alone does not identify Holleton. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.