Home Postcode finder QLD Cannon Creek Cannon Creek postcode QLD Cannon Creek is a locality in Queensland covered by postcode 4380. Postcode 4380 State or territory Queensland (QLD) Region Toowoomba Region Add a free Cannon Creek business listing Be the first listing in Cannon Creek Common questionsWhat is the postcode for Cannon Creek?Cannon Creek, QLD has the postcode 4380.What state is Cannon Creek in?Cannon Creek is in Queensland (QLD).Does postcode 4380 cover more than one suburb?Yes. Postcode 4380 covers 19 localities, so the postcode alone does not identify Cannon Creek. It also appears in 2 states or territories, so it does not identify a state either. Browse other postcodes in Queensland, or widen the search to every Australian postcode.