Home Postcode finder VIC Cotham Cotham postcode VIC Cotham is a locality in Victoria covered by postcode 3101. Postcode 3101 State or territory Victoria (VIC) Region Hawthorn Add a free Cotham business listing Be the first listing in Cotham Common questionsWhat is the postcode for Cotham?Cotham, VIC has the postcode 3101.What state is Cotham in?Cotham is in Victoria (VIC).Does postcode 3101 cover more than one suburb?Yes. Postcode 3101 covers 2 localities, so the postcode alone does not identify Cotham. Browse other postcodes in Victoria, or widen the search to every Australian postcode.