Home Postcode finder WA Rocky Gully Rocky Gully postcode WA Rocky Gully is a locality in Western Australia covered by postcode 6397. Postcode 6397 State or territory Western Australia (WA) Region Wa Subs 2 Gsr Add a free Rocky Gully business listing Be the first listing in Rocky Gully Common questionsWhat is the postcode for Rocky Gully?Rocky Gully, WA has the postcode 6397.What state is Rocky Gully in?Rocky Gully is in Western Australia (WA).Does postcode 6397 cover more than one suburb?No. Postcode 6397 covers Rocky Gully only, which is unusual - most Australian postcodes cover several localities. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.