Home Postcode finder QLD Glenarbon Glenarbon postcode QLD Glenarbon is a locality in Queensland covered by postcode 4385. Postcode 4385 State or territory Queensland (QLD) Region Toowoomba Region Add a free Glenarbon business listing Be the first listing in Glenarbon Common questionsWhat is the postcode for Glenarbon?Glenarbon, QLD has the postcode 4385.What state is Glenarbon in?Glenarbon is in Queensland (QLD).Does postcode 4385 cover more than one suburb?Yes. Postcode 4385 covers 10 localities, so the postcode alone does not identify Glenarbon. It also appears in 2 states or territories, so it does not identify a state either. Browse other postcodes in Queensland, or widen the search to every Australian postcode.