Home Postcode finder WA South Kumminin South Kumminin postcode WA South Kumminin is a locality in Western Australia covered by postcode 6368. Postcode 6368 State or territory Western Australia (WA) Region Wa Subs 2 Gsr Add a free South Kumminin business listing Be the first listing in South Kumminin Common questionsWhat is the postcode for South Kumminin?South Kumminin, WA has the postcode 6368.What state is South Kumminin in?South Kumminin is in Western Australia (WA).Does postcode 6368 cover more than one suburb?No. Postcode 6368 covers South Kumminin only, which is unusual - most Australian postcodes cover several localities. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.