Home Postcode finder WA Yanmah Yanmah postcode WA Yanmah is a locality in Western Australia covered by postcode 6258. Postcode 6258 State or territory Western Australia (WA) Region Wa Subs 3 Sth Rd Add a free Yanmah business listing Be the first listing in Yanmah Common questionsWhat is the postcode for Yanmah?Yanmah, WA has the postcode 6258.What state is Yanmah in?Yanmah is in Western Australia (WA).Does postcode 6258 cover more than one suburb?Yes. Postcode 6258 covers 22 localities, so the postcode alone does not identify Yanmah. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.