Home Postcode finder WA West Popanyinning West Popanyinning postcode WA West Popanyinning is a locality in Western Australia covered by postcode 6309. Postcode 6309 State or territory Western Australia (WA) Region Wa Subs 2 Gsr Add a free West Popanyinning business listing Be the first listing in West Popanyinning Common questionsWhat is the postcode for West Popanyinning?West Popanyinning, WA has the postcode 6309.What state is West Popanyinning in?West Popanyinning is in Western Australia (WA).Does postcode 6309 cover more than one suburb?Yes. Postcode 6309 covers 4 localities, so the postcode alone does not identify West Popanyinning. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.