Home Postcode finder VIC Cosgrove Cosgrove postcode VIC Cosgrove is a locality in Victoria covered by postcode 3631. Postcode 3631 State or territory Victoria (VIC) Region Vic Far Country Add a free Cosgrove business listing Be the first listing in Cosgrove Common questionsWhat is the postcode for Cosgrove?Cosgrove, VIC has the postcode 3631.What state is Cosgrove in?Cosgrove is in Victoria (VIC).Does postcode 3631 cover more than one suburb?Yes. Postcode 3631 covers 14 localities, so the postcode alone does not identify Cosgrove. Browse other postcodes in Victoria, or widen the search to every Australian postcode.