Home Postcode finder QLD Dumbleton Dumbleton postcode QLD Dumbleton is a locality in Queensland covered by postcode 4740. Postcode 4740 State or territory Queensland (QLD) Region Central QLD Add a free Dumbleton business listing Be the first listing in Dumbleton Common questionsWhat is the postcode for Dumbleton?Dumbleton, QLD has the postcode 4740.What state is Dumbleton in?Dumbleton is in Queensland (QLD).Does postcode 4740 cover more than one suburb?Yes. Postcode 4740 covers 50 localities, so the postcode alone does not identify Dumbleton. Browse other postcodes in Queensland, or widen the search to every Australian postcode.