Home Postcode finder QLD West Haldon West Haldon postcode QLD West Haldon is a locality in Queensland covered by postcode 4359. Postcode 4359 State or territory Queensland (QLD) Region Toowoomba Region Add a free West Haldon business listing Be the first listing in West Haldon Common questionsWhat is the postcode for West Haldon?West Haldon, QLD has the postcode 4359.What state is West Haldon in?West Haldon is in Queensland (QLD).Does postcode 4359 cover more than one suburb?Yes. Postcode 4359 covers 5 localities, so the postcode alone does not identify West Haldon. Browse other postcodes in Queensland, or widen the search to every Australian postcode.