Home Postcode finder QLD Kooralgin Kooralgin postcode QLD Kooralgin is a locality in Queensland covered by postcode 4402. Postcode 4402 State or territory Queensland (QLD) Region Toowoomba Region Add a free Kooralgin business listing Be the first listing in Kooralgin Common questionsWhat is the postcode for Kooralgin?Kooralgin, QLD has the postcode 4402.What state is Kooralgin in?Kooralgin is in Queensland (QLD).Does postcode 4402 cover more than one suburb?Yes. Postcode 4402 covers 3 localities, so the postcode alone does not identify Kooralgin. Browse other postcodes in Queensland, or widen the search to every Australian postcode.