Home Postcode finder WA Elgin Elgin postcode WA Elgin is a locality in Western Australia covered by postcode 6237. Postcode 6237 State or territory Western Australia (WA) Region Wa Subs 3 Sth Rd Add a free Elgin business listing Be the first listing in Elgin Common questionsWhat is the postcode for Elgin?Elgin, WA has the postcode 6237.What state is Elgin in?Elgin is in Western Australia (WA).Does postcode 6237 cover more than one suburb?Yes. Postcode 6237 covers 6 localities, so the postcode alone does not identify Elgin. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.