Home Postcode finder WA Cowalellup Cowalellup postcode WA Cowalellup is a locality in Western Australia covered by postcode 6336. Postcode 6336 State or territory Western Australia (WA) Region Wa Subs 2 Gsr Add a free Cowalellup business listing Be the first listing in Cowalellup Common questionsWhat is the postcode for Cowalellup?Cowalellup, WA has the postcode 6336.What state is Cowalellup in?Cowalellup is in Western Australia (WA).Does postcode 6336 cover more than one suburb?Yes. Postcode 6336 covers 6 localities, so the postcode alone does not identify Cowalellup. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.