Home Postcode finder VIC Tarwin Tarwin postcode VIC Tarwin is a locality in Victoria covered by postcode 3956. Postcode 3956 State or territory Victoria (VIC) Region Vic Far Country Add a free Tarwin business listing Be the first listing in Tarwin Common questionsWhat is the postcode for Tarwin?Tarwin, VIC has the postcode 3956.What state is Tarwin in?Tarwin is in Victoria (VIC).Does postcode 3956 cover more than one suburb?Yes. Postcode 3956 covers 9 localities, so the postcode alone does not identify Tarwin. Browse other postcodes in Victoria, or widen the search to every Australian postcode.