Home Postcode finder WA Preston Settlement Preston Settlement postcode WA Preston Settlement is a locality in Western Australia covered by postcode 6225. Postcode 6225 State or territory Western Australia (WA) Region Wa Subs 3 Sth Rd Add a free Preston Settlement business listing Be the first listing in Preston Settlement Common questionsWhat is the postcode for Preston Settlement?Preston Settlement, WA has the postcode 6225.What state is Preston Settlement in?Preston Settlement is in Western Australia (WA).Does postcode 6225 cover more than one suburb?Yes. Postcode 6225 covers 18 localities, so the postcode alone does not identify Preston Settlement. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.