Home Postcode finder WA Crooked Brook Crooked Brook postcode WA Crooked Brook is a locality in Western Australia covered by postcode 6236. Postcode 6236 State or territory Western Australia (WA) Region Wa Subs 3 Sth Rd Add a free Crooked Brook business listing Be the first listing in Crooked Brook Common questionsWhat is the postcode for Crooked Brook?Crooked Brook, WA has the postcode 6236.What state is Crooked Brook in?Crooked Brook is in Western Australia (WA).Does postcode 6236 cover more than one suburb?Yes. Postcode 6236 covers 8 localities, so the postcode alone does not identify Crooked Brook. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.