Home Postcode finder WA Boya Boya postcode WA Boya is a locality in Western Australia covered by postcode 6056. Postcode 6056 State or territory Western Australia (WA) Region North West Suburbs Add a free Boya business listing Be the first listing in Boya Common questionsWhat is the postcode for Boya?Boya, WA has the postcode 6056.What state is Boya in?Boya is in Western Australia (WA).Does postcode 6056 cover more than one suburb?Yes. Postcode 6056 covers 17 localities, so the postcode alone does not identify Boya. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.