Home Postcode finder QLD Washpool Washpool postcode QLD Washpool is a locality in Queensland covered by postcode 4306. Postcode 4306 State or territory Queensland (QLD) Region Western Suburbs Add a free Washpool business listing Be the first listing in Washpool Common questionsWhat is the postcode for Washpool?Washpool, QLD has the postcode 4306.What state is Washpool in?Washpool is in Queensland (QLD).Does postcode 4306 cover more than one suburb?Yes. Postcode 4306 covers 56 localities, so the postcode alone does not identify Washpool. Browse other postcodes in Queensland, or widen the search to every Australian postcode.