Home Postcode finder VIC Douglas Douglas postcode VIC Douglas is a locality in Victoria covered by postcode 3409. Postcode 3409 State or territory Victoria (VIC) Region Vic Far Country Add a free Douglas business listing Be the first listing in Douglas Common questionsWhat is the postcode for Douglas?Douglas, VIC has the postcode 3409.What state is Douglas in?Douglas is in Victoria (VIC).Does postcode 3409 cover more than one suburb?Yes. Postcode 3409 covers 12 localities, so the postcode alone does not identify Douglas. Browse other postcodes in Victoria, or widen the search to every Australian postcode.