Home Postcode finder QLD Kilcummin Kilcummin postcode QLD Kilcummin is a locality in Queensland covered by postcode 4721. Postcode 4721 State or territory Queensland (QLD) Region Central QLD Add a free Kilcummin business listing Be the first listing in Kilcummin Common questionsWhat is the postcode for Kilcummin?Kilcummin, QLD has the postcode 4721.What state is Kilcummin in?Kilcummin is in Queensland (QLD).Does postcode 4721 cover more than one suburb?Yes. Postcode 4721 covers 8 localities, so the postcode alone does not identify Kilcummin. Browse other postcodes in Queensland, or widen the search to every Australian postcode.