Home Postcode finder WA South Stirling South Stirling postcode WA South Stirling is a locality in Western Australia covered by postcode 6324. Postcode 6324 State or territory Western Australia (WA) Region Wa Subs 2 Gsr Add a free South Stirling business listing Be the first listing in South Stirling Common questionsWhat is the postcode for South Stirling?South Stirling, WA has the postcode 6324.What state is South Stirling in?South Stirling is in Western Australia (WA).Does postcode 6324 cover more than one suburb?Yes. Postcode 6324 covers 8 localities, so the postcode alone does not identify South Stirling. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.