Home Postcode finder QLD Stewarton Stewarton postcode QLD Stewarton is a locality in Queensland covered by postcode 4702. Postcode 4702 State or territory Queensland (QLD) Region Central QLD Add a free Stewarton business listing Be the first listing in Stewarton Common questionsWhat is the postcode for Stewarton?Stewarton, QLD has the postcode 4702.What state is Stewarton in?Stewarton is in Queensland (QLD).Does postcode 4702 cover more than one suburb?Yes. Postcode 4702 covers 87 localities, so the postcode alone does not identify Stewarton. Browse other postcodes in Queensland, or widen the search to every Australian postcode.