Home Postcode finder QLD Kulgun Kulgun postcode QLD Kulgun is a locality in Queensland covered by postcode 4309. Postcode 4309 State or territory Queensland (QLD) Region Western Suburbs Add a free Kulgun business listing Be the first listing in Kulgun Common questionsWhat is the postcode for Kulgun?Kulgun, QLD has the postcode 4309.What state is Kulgun in?Kulgun is in Queensland (QLD).Does postcode 4309 cover more than one suburb?Yes. Postcode 4309 covers 17 localities, so the postcode alone does not identify Kulgun. Browse other postcodes in Queensland, or widen the search to every Australian postcode.