Home Postcode finder QLD Crossdale Crossdale postcode QLD Crossdale is a locality in Queensland covered by postcode 4312. Postcode 4312 State or territory Queensland (QLD) Region Western Suburbs Add a free Crossdale business listing Be the first listing in Crossdale Common questionsWhat is the postcode for Crossdale?Crossdale, QLD has the postcode 4312.What state is Crossdale in?Crossdale is in Queensland (QLD).Does postcode 4312 cover more than one suburb?Yes. Postcode 4312 covers 13 localities, so the postcode alone does not identify Crossdale. Browse other postcodes in Queensland, or widen the search to every Australian postcode.