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