Home Postcode finder QLD Blackbutt South Blackbutt South postcode QLD Blackbutt South is a locality in Queensland covered by postcode 4306. Postcode 4306 State or territory Queensland (QLD) Region Western Suburbs Add a free Blackbutt South business listing Be the first listing in Blackbutt South Common questionsWhat is the postcode for Blackbutt South?Blackbutt South, QLD has the postcode 4306.What state is Blackbutt South in?Blackbutt South is in Queensland (QLD).Does postcode 4306 cover more than one suburb?Yes. Postcode 4306 covers 56 localities, so the postcode alone does not identify Blackbutt South. Browse other postcodes in Queensland, or widen the search to every Australian postcode.