Home Postcode finder WA Kumarina Kumarina postcode WA Kumarina is a locality in Western Australia covered by postcode 6642. Postcode 6642 State or territory Western Australia (WA) Region North West Suburbs Add a free Kumarina business listing Be the first listing in Kumarina Common questionsWhat is the postcode for Kumarina?Kumarina, WA has the postcode 6642.What state is Kumarina in?Kumarina is in Western Australia (WA).Does postcode 6642 cover more than one suburb?Yes. Postcode 6642 covers 5 localities, so the postcode alone does not identify Kumarina. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.