Home Postcode finder VIC Winnambool Winnambool postcode VIC Winnambool is a locality in Victoria covered by postcode 3546. Postcode 3546 State or territory Victoria (VIC) Region Vic Far Country Add a free Winnambool business listing Be the first listing in Winnambool Common questionsWhat is the postcode for Winnambool?Winnambool, VIC has the postcode 3546.What state is Winnambool in?Winnambool is in Victoria (VIC).Does postcode 3546 cover more than one suburb?Yes. Postcode 3546 covers 7 localities, so the postcode alone does not identify Winnambool. Browse other postcodes in Victoria, or widen the search to every Australian postcode.