Home Postcode finder VIC Seaton Seaton postcode VIC Seaton is a locality in Victoria covered by postcode 3858. Postcode 3858 State or territory Victoria (VIC) Region Vic Far Country Add a free Seaton business listing Be the first listing in Seaton Common questionsWhat is the postcode for Seaton?Seaton, VIC has the postcode 3858.What state is Seaton in?Seaton is in Victoria (VIC).Does postcode 3858 cover more than one suburb?Yes. Postcode 3858 covers 20 localities, so the postcode alone does not identify Seaton. Browse other postcodes in Victoria, or widen the search to every Australian postcode.