Home Postcode finder WA Marybrook Marybrook postcode WA Marybrook is a locality in Western Australia covered by postcode 6280. Postcode 6280 State or territory Western Australia (WA) Region Wa Subs 3 Sth Rd Add a free Marybrook business listing Be the first listing in Marybrook Common questionsWhat is the postcode for Marybrook?Marybrook, WA has the postcode 6280.What state is Marybrook in?Marybrook is in Western Australia (WA).Does postcode 6280 cover more than one suburb?Yes. Postcode 6280 covers 34 localities, so the postcode alone does not identify Marybrook. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.