Home Postcode finder VIC Medlyn Medlyn postcode VIC Medlyn is a locality in Victoria covered by postcode 3478. Postcode 3478 State or territory Victoria (VIC) Region Vic Far Country Add a free Medlyn business listing Be the first listing in Medlyn Common questionsWhat is the postcode for Medlyn?Medlyn, VIC has the postcode 3478.What state is Medlyn in?Medlyn is in Victoria (VIC).Does postcode 3478 cover more than one suburb?Yes. Postcode 3478 covers 8 localities, so the postcode alone does not identify Medlyn. Browse other postcodes in Victoria, or widen the search to every Australian postcode.