Home Postcode finder QLD Chelmsford Chelmsford postcode QLD Chelmsford is a locality in Queensland covered by postcode 4606. Postcode 4606 State or territory Queensland (QLD) Region Toowoomba Region Add a free Chelmsford business listing Be the first listing in Chelmsford Common questionsWhat is the postcode for Chelmsford?Chelmsford, QLD has the postcode 4606.What state is Chelmsford in?Chelmsford is in Queensland (QLD).Does postcode 4606 cover more than one suburb?Yes. Postcode 4606 covers 9 localities, so the postcode alone does not identify Chelmsford. Browse other postcodes in Queensland, or widen the search to every Australian postcode.