Home Postcode finder WA South Yilgarn South Yilgarn postcode WA South Yilgarn is a locality in Western Australia covered by postcode 6426. Postcode 6426 State or territory Western Australia (WA) Region Wa Subs 1 G Flds Add a free South Yilgarn business listing Be the first listing in South Yilgarn Common questionsWhat is the postcode for South Yilgarn?South Yilgarn, WA has the postcode 6426.What state is South Yilgarn in?South Yilgarn is in Western Australia (WA).Does postcode 6426 cover more than one suburb?Yes. Postcode 6426 covers 14 localities, so the postcode alone does not identify South Yilgarn. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.