Home Postcode finder QLD Charlwood Charlwood postcode QLD Charlwood is a locality in Queensland covered by postcode 4309. Postcode 4309 State or territory Queensland (QLD) Region Western Suburbs Add a free Charlwood business listing Be the first listing in Charlwood Common questionsWhat is the postcode for Charlwood?Charlwood, QLD has the postcode 4309.What state is Charlwood in?Charlwood is in Queensland (QLD).Does postcode 4309 cover more than one suburb?Yes. Postcode 4309 covers 17 localities, so the postcode alone does not identify Charlwood. Browse other postcodes in Queensland, or widen the search to every Australian postcode.