Home Postcode finder QLD Glenhaughton Glenhaughton postcode QLD Glenhaughton is a locality in Queensland covered by postcode 4420. Postcode 4420 State or territory Queensland (QLD) Region Toowoomba Region Add a free Glenhaughton business listing Be the first listing in Glenhaughton Common questionsWhat is the postcode for Glenhaughton?Glenhaughton, QLD has the postcode 4420.What state is Glenhaughton in?Glenhaughton is in Queensland (QLD).Does postcode 4420 cover more than one suburb?Yes. Postcode 4420 covers 8 localities, so the postcode alone does not identify Glenhaughton. Browse other postcodes in Queensland, or widen the search to every Australian postcode.