Home Postcode finder VIC Snake Island Snake Island postcode VIC Snake Island is a locality in Victoria covered by postcode 3971. Postcode 3971 State or territory Victoria (VIC) Region Vic Far Country Add a free Snake Island business listing Be the first listing in Snake Island Common questionsWhat is the postcode for Snake Island?Snake Island, VIC has the postcode 3971.What state is Snake Island in?Snake Island is in Victoria (VIC).Does postcode 3971 cover more than one suburb?Yes. Postcode 3971 covers 21 localities, so the postcode alone does not identify Snake Island. Browse other postcodes in Victoria, or widen the search to every Australian postcode.