Home Postcode finder WA Stratham Stratham postcode WA Stratham 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 Stratham business listing Be the first listing in Stratham Common questionsWhat is the postcode for Stratham?Stratham, WA has the postcode 6237.What state is Stratham in?Stratham 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 Stratham. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.