Home Postcode finder QLD Calvert Calvert postcode QLD Calvert is a locality in Queensland covered by postcode 4340. Postcode 4340 State or territory Queensland (QLD) Region Western Suburbs Add a free Calvert business listing Be the first listing in Calvert Common questionsWhat is the postcode for Calvert?Calvert, QLD has the postcode 4340.What state is Calvert in?Calvert is in Queensland (QLD).Does postcode 4340 cover more than one suburb?Yes. Postcode 4340 covers 18 localities, so the postcode alone does not identify Calvert. Browse other postcodes in Queensland, or widen the search to every Australian postcode.