Home Postcode finder VIC Houston Houston postcode VIC Houston is a locality in Victoria covered by postcode 3128. Postcode 3128 State or territory Victoria (VIC) Region Ferntree Gully Add a free Houston business listing Be the first listing in Houston Common questionsWhat is the postcode for Houston?Houston, VIC has the postcode 3128.What state is Houston in?Houston is in Victoria (VIC).Does postcode 3128 cover more than one suburb?Yes. Postcode 3128 covers 5 localities, so the postcode alone does not identify Houston. Browse other postcodes in Victoria, or widen the search to every Australian postcode.