Home Postcode finder WA Kwolyin Kwolyin postcode WA Kwolyin is a locality in Western Australia covered by postcode 6385. Postcode 6385 State or territory Western Australia (WA) Region Wa Subs 2 Gsr Add a free Kwolyin business listing Be the first listing in Kwolyin Common questionsWhat is the postcode for Kwolyin?Kwolyin, WA has the postcode 6385.What state is Kwolyin in?Kwolyin is in Western Australia (WA).Does postcode 6385 cover more than one suburb?No. Postcode 6385 covers Kwolyin only, which is unusual - most Australian postcodes cover several localities. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.