Home Postcode finder VIC Gredgwin Gredgwin postcode VIC Gredgwin is a locality in Victoria covered by postcode 3537. Postcode 3537 State or territory Victoria (VIC) Region Vic Far Country Add a free Gredgwin business listing Be the first listing in Gredgwin Common questionsWhat is the postcode for Gredgwin?Gredgwin, VIC has the postcode 3537.What state is Gredgwin in?Gredgwin is in Victoria (VIC).Does postcode 3537 cover more than one suburb?Yes. Postcode 3537 covers 9 localities, so the postcode alone does not identify Gredgwin. Browse other postcodes in Victoria, or widen the search to every Australian postcode.