Home Postcode finder WA Catterick Catterick postcode WA Catterick is a locality in Western Australia covered by postcode 6255. Postcode 6255 State or territory Western Australia (WA) Region Wa Subs 3 Sth Rd Add a free Catterick business listing Be the first listing in Catterick Common questionsWhat is the postcode for Catterick?Catterick, WA has the postcode 6255.What state is Catterick in?Catterick is in Western Australia (WA).Does postcode 6255 cover more than one suburb?Yes. Postcode 6255 covers 7 localities, so the postcode alone does not identify Catterick. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.