Home Postcode finder VIC Killingworth Killingworth postcode VIC Killingworth is a locality in Victoria covered by postcode 3717. Postcode 3717 State or territory Victoria (VIC) Region Vic Far Country Add a free Killingworth business listing Be the first listing in Killingworth Common questionsWhat is the postcode for Killingworth?Killingworth, VIC has the postcode 3717.What state is Killingworth in?Killingworth is in Victoria (VIC).Does postcode 3717 cover more than one suburb?Yes. Postcode 3717 covers 8 localities, so the postcode alone does not identify Killingworth. Browse other postcodes in Victoria, or widen the search to every Australian postcode.