Home Postcode finder QLD Crownthorpe Crownthorpe postcode QLD Crownthorpe is a locality in Queensland covered by postcode 4605. Postcode 4605 State or territory Queensland (QLD) Region Toowoomba Region Add a free Crownthorpe business listing Be the first listing in Crownthorpe Common questionsWhat is the postcode for Crownthorpe?Crownthorpe, QLD has the postcode 4605.What state is Crownthorpe in?Crownthorpe is in Queensland (QLD).Does postcode 4605 cover more than one suburb?Yes. Postcode 4605 covers 21 localities, so the postcode alone does not identify Crownthorpe. Browse other postcodes in Queensland, or widen the search to every Australian postcode.