Home Postcode finder WA Leeuwin Leeuwin postcode WA Leeuwin is a locality in Western Australia covered by postcode 6290. Postcode 6290 State or territory Western Australia (WA) Region Wa Subs 3 Sth Rd Add a free Leeuwin business listing Be the first listing in Leeuwin Common questionsWhat is the postcode for Leeuwin?Leeuwin, WA has the postcode 6290.What state is Leeuwin in?Leeuwin is in Western Australia (WA).Does postcode 6290 cover more than one suburb?Yes. Postcode 6290 covers 6 localities, so the postcode alone does not identify Leeuwin. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.