Home Postcode finder VIC Avonsleigh Avonsleigh postcode VIC Avonsleigh is a locality in Victoria covered by postcode 3782. Postcode 3782 State or territory Victoria (VIC) Region Ferntree Gully Add a free Avonsleigh business listing Be the first listing in Avonsleigh Common questionsWhat is the postcode for Avonsleigh?Avonsleigh, VIC has the postcode 3782.What state is Avonsleigh in?Avonsleigh is in Victoria (VIC).Does postcode 3782 cover more than one suburb?Yes. Postcode 3782 covers 4 localities, so the postcode alone does not identify Avonsleigh. Browse other postcodes in Victoria, or widen the search to every Australian postcode.