Home Postcode finder WA Palmer Palmer postcode WA Palmer 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 Palmer business listing Be the first listing in Palmer Common questionsWhat is the postcode for Palmer?Palmer, WA has the postcode 6225.What state is Palmer in?Palmer 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 Palmer. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.