Home Postcode finder WA Stratherne Stratherne postcode WA Stratherne is a locality in Western Australia covered by postcode 6309. Postcode 6309 State or territory Western Australia (WA) Region Wa Subs 2 Gsr Add a free Stratherne business listing Be the first listing in Stratherne Common questionsWhat is the postcode for Stratherne?Stratherne, WA has the postcode 6309.What state is Stratherne in?Stratherne is in Western Australia (WA).Does postcode 6309 cover more than one suburb?Yes. Postcode 6309 covers 4 localities, so the postcode alone does not identify Stratherne. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.