Home Postcode finder VIC Middle Tarwin Middle Tarwin postcode VIC Middle Tarwin is a locality in Victoria covered by postcode 3956. Postcode 3956 State or territory Victoria (VIC) Region Vic Far Country Add a free Middle Tarwin business listing Be the first listing in Middle Tarwin Common questionsWhat is the postcode for Middle Tarwin?Middle Tarwin, VIC has the postcode 3956.What state is Middle Tarwin in?Middle 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 Middle Tarwin. Browse other postcodes in Victoria, or widen the search to every Australian postcode.