Home Postcode finder VIC Wilby Wilby postcode VIC Wilby is a locality in Victoria covered by postcode 3728. Postcode 3728 State or territory Victoria (VIC) Region Vic Far Country Add a free Wilby business listing Be the first listing in Wilby Common questionsWhat is the postcode for Wilby?Wilby, VIC has the postcode 3728.What state is Wilby in?Wilby is in Victoria (VIC).Does postcode 3728 cover more than one suburb?Yes. Postcode 3728 covers 4 localities, so the postcode alone does not identify Wilby. Browse other postcodes in Victoria, or widen the search to every Australian postcode.