Home Postcode finder WA Holmwood Holmwood postcode WA Holmwood is a locality in Western Australia covered by postcode 6522. Postcode 6522 State or territory Western Australia (WA) Region Wa Subs 4 Coast Add a free Holmwood business listing Be the first listing in Holmwood Common questionsWhat is the postcode for Holmwood?Holmwood, WA has the postcode 6522.What state is Holmwood in?Holmwood is in Western Australia (WA).Does postcode 6522 cover more than one suburb?Yes. Postcode 6522 covers 10 localities, so the postcode alone does not identify Holmwood. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.