Home Postcode finder VIC Iona Iona postcode VIC Iona is a locality in Victoria covered by postcode 3815. Postcode 3815 State or territory Victoria (VIC) Region Vic Far Country Add a free Iona business listing Be the first listing in Iona Common questionsWhat is the postcode for Iona?Iona, VIC has the postcode 3815.What state is Iona in?Iona is in Victoria (VIC).Does postcode 3815 cover more than one suburb?Yes. Postcode 3815 covers 4 localities, so the postcode alone does not identify Iona. Browse other postcodes in Victoria, or widen the search to every Australian postcode.