Home Postcode finder QLD Charlestown Charlestown postcode QLD Charlestown is a locality in Queensland covered by postcode 4608. Postcode 4608 State or territory Queensland (QLD) Region Toowoomba Region Add a free Charlestown business listing Be the first listing in Charlestown Common questionsWhat is the postcode for Charlestown?Charlestown, QLD has the postcode 4608.What state is Charlestown in?Charlestown is in Queensland (QLD).Does postcode 4608 cover more than one suburb?Yes. Postcode 4608 covers 5 localities, so the postcode alone does not identify Charlestown. Browse other postcodes in Queensland, or widen the search to every Australian postcode.