Home Postcode finder QLD Lansdowne Lansdowne postcode QLD Lansdowne is a locality in Queensland covered by postcode 4478. Postcode 4478 State or territory Queensland (QLD) Region Toowoomba Region Add a free Lansdowne business listing Be the first listing in Lansdowne Common questionsWhat is the postcode for Lansdowne?Lansdowne, QLD has the postcode 4478.What state is Lansdowne in?Lansdowne is in Queensland (QLD).Does postcode 4478 cover more than one suburb?Yes. Postcode 4478 covers 10 localities, so the postcode alone does not identify Lansdowne. Browse other postcodes in Queensland, or widen the search to every Australian postcode.