Home Postcode finder QLD Sexton Sexton postcode QLD Sexton is a locality in Queensland covered by postcode 4570. Postcode 4570 State or territory Queensland (QLD) Region Sunshine Coast Add a free Sexton business listing Be the first listing in Sexton Common questionsWhat is the postcode for Sexton?Sexton, QLD has the postcode 4570.What state is Sexton in?Sexton is in Queensland (QLD).Does postcode 4570 cover more than one suburb?Yes. Postcode 4570 covers 85 localities, so the postcode alone does not identify Sexton. Browse other postcodes in Queensland, or widen the search to every Australian postcode.