Home Postcode finder VIC Granite Flat Granite Flat postcode VIC Granite Flat is a locality in Victoria covered by postcode 3525. Postcode 3525 State or territory Victoria (VIC) Region Vic Far Country Add a free Granite Flat business listing Be the first listing in Granite Flat Common questionsWhat is the postcode for Granite Flat?Granite Flat, VIC has the postcode 3525.What state is Granite Flat in?Granite Flat is in Victoria (VIC).Does postcode 3525 cover more than one suburb?Yes. Postcode 3525 covers 13 localities, so the postcode alone does not identify Granite Flat. Browse other postcodes in Victoria, or widen the search to every Australian postcode.