Home Postcodes by state QLD Kilcummin Kilcummin postcode QLD Kilcummin is a locality in Queensland covered by postcode 4721. Postcode 4721 (every locality with postcode 4721) State or territory Queensland (QLD) Region Central QLD Council area Isaac Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Add a free Kilcummin business listing Be the first listing in Kilcummin Also in postcode 4721ArgyllQLD 4721ClermontQLD 4721FrankfieldQLD 4721Gemini MountainsQLD 4721PashaQLD 4721Theresa CreekQLD 4721WolfangQLD 4721 Common questionsWhat is the postcode for Kilcummin?Kilcummin, QLD has the postcode 4721.What state is Kilcummin in?Kilcummin is in Queensland (QLD).What council is Kilcummin in?Kilcummin is in the Isaac local government area.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.