Home Postcode finder WA Newdegate Newdegate postcode WA Newdegate is a locality in Western Australia covered by postcode 6355. Postcode 6355 State or territory Western Australia (WA) Region Wa Subs 2 Gsr Add a free Newdegate business listing More business listings in Newdegate Businesses in NewdegateNewdegate Primary SchoolMitchell St · 08 98711600 Common questionsWhat is the postcode for Newdegate?Newdegate, WA has the postcode 6355.What state is Newdegate in?Newdegate is in Western Australia (WA).Does postcode 6355 cover more than one suburb?Yes. Postcode 6355 covers 11 localities, so the postcode alone does not identify Newdegate. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.