Home Postcode finder WA North Lake North Lake postcode WA North Lake is a locality in Western Australia covered by postcode 6163. Postcode 6163 State or territory Western Australia (WA) Region Wa Subs 3 Sth Rd Add a free North Lake business listing Be the first listing in North Lake Common questionsWhat is the postcode for North Lake?North Lake, WA has the postcode 6163.What state is North Lake in?North Lake is in Western Australia (WA).Does postcode 6163 cover more than one suburb?Yes. Postcode 6163 covers 10 localities, so the postcode alone does not identify North Lake. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.