Home Postcode finder QLD Glengallan Glengallan postcode QLD Glengallan is a locality in Queensland covered by postcode 4370. Postcode 4370 State or territory Queensland (QLD) Region Toowoomba Region Add a free Glengallan business listing Be the first listing in Glengallan Common questionsWhat is the postcode for Glengallan?Glengallan, QLD has the postcode 4370.What state is Glengallan in?Glengallan is in Queensland (QLD).Does postcode 4370 cover more than one suburb?Yes. Postcode 4370 covers 46 localities, so the postcode alone does not identify Glengallan. Browse other postcodes in Queensland, or widen the search to every Australian postcode.