Home Postcode finder WA South Tammin South Tammin postcode WA South Tammin is a locality in Western Australia covered by postcode 6409. Postcode 6409 State or territory Western Australia (WA) Region Wa Subs 1 G Flds Add a free South Tammin business listing Be the first listing in South Tammin Common questionsWhat is the postcode for South Tammin?South Tammin, WA has the postcode 6409.What state is South Tammin in?South Tammin is in Western Australia (WA).Does postcode 6409 cover more than one suburb?Yes. Postcode 6409 covers 3 localities, so the postcode alone does not identify South Tammin. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.