Home Postcode finder WA Yourdamung Lake Yourdamung Lake postcode WA Yourdamung Lake is a locality in Western Australia covered by postcode 6225. Postcode 6225 State or territory Western Australia (WA) Region Wa Subs 3 Sth Rd Add a free Yourdamung Lake business listing Be the first listing in Yourdamung Lake Common questionsWhat is the postcode for Yourdamung Lake?Yourdamung Lake, WA has the postcode 6225.What state is Yourdamung Lake in?Yourdamung Lake is in Western Australia (WA).Does postcode 6225 cover more than one suburb?Yes. Postcode 6225 covers 18 localities, so the postcode alone does not identify Yourdamung Lake. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.