Home Postcode finder WA Lyndon Lyndon postcode WA Lyndon is a locality in Western Australia covered by postcode 6701. Postcode 6701 State or territory Western Australia (WA) Region North West Suburbs Add a free Lyndon business listing Be the first listing in Lyndon Common questionsWhat is the postcode for Lyndon?Lyndon, WA has the postcode 6701.What state is Lyndon in?Lyndon is in Western Australia (WA).Does postcode 6701 cover more than one suburb?Yes. Postcode 6701 covers 28 localities, so the postcode alone does not identify Lyndon. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.