Home Postcode finder VIC Longwood Longwood postcode VIC Longwood is a locality in Victoria covered by postcode 3665. Postcode 3665 State or territory Victoria (VIC) Region Vic Far Country Add a free Longwood business listing More business listings in Longwood Businesses in LongwoodLongwood Primary SchoolHurley St · 03 57985386 Common questionsWhat is the postcode for Longwood?Longwood, VIC has the postcode 3665.What state is Longwood in?Longwood is in Victoria (VIC).Does postcode 3665 cover more than one suburb?Yes. Postcode 3665 covers 2 localities, so the postcode alone does not identify Longwood. Browse other postcodes in Victoria, or widen the search to every Australian postcode.