Home Postcode finder VIC Long Forest Long Forest postcode VIC Long Forest is a locality in Victoria covered by postcode 3340. Postcode 3340 State or territory Victoria (VIC) Region Melbourne North West Add a free Long Forest business listing Be the first listing in Long Forest Common questionsWhat is the postcode for Long Forest?Long Forest, VIC has the postcode 3340.What state is Long Forest in?Long Forest is in Victoria (VIC).Does postcode 3340 cover more than one suburb?Yes. Postcode 3340 covers 12 localities, so the postcode alone does not identify Long Forest. Browse other postcodes in Victoria, or widen the search to every Australian postcode.