Home Postcode finder VIC Stewarton Stewarton postcode VIC Stewarton is a locality in Victoria covered by postcode 3725. Postcode 3725 State or territory Victoria (VIC) Region Vic Far Country Add a free Stewarton business listing Be the first listing in Stewarton Common questionsWhat is the postcode for Stewarton?Stewarton, VIC has the postcode 3725.What state is Stewarton in?Stewarton is in Victoria (VIC).Does postcode 3725 cover more than one suburb?Yes. Postcode 3725 covers 5 localities, so the postcode alone does not identify Stewarton. Browse other postcodes in Victoria, or widen the search to every Australian postcode.