Home Postcode finder WA Brookton Brookton postcode WA Brookton is a locality in Western Australia covered by postcode 6306. Postcode 6306 State or territory Western Australia (WA) Region Wa Subs 2 Gsr Add a free Brookton business listing More business listings in Brookton Businesses in BrooktonBrookton District High SchoolTiller St · 08 96421011 Common questionsWhat is the postcode for Brookton?Brookton, WA has the postcode 6306.What state is Brookton in?Brookton is in Western Australia (WA).Does postcode 6306 cover more than one suburb?Yes. Postcode 6306 covers 5 localities, so the postcode alone does not identify Brookton. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.