Home Postcode finder WA West Lyons River West Lyons River postcode WA West Lyons River is a locality in Western Australia covered by postcode 6705. Postcode 6705 State or territory Western Australia (WA) Region North West Suburbs Add a free West Lyons River business listing Be the first listing in West Lyons River Common questionsWhat is the postcode for West Lyons River?West Lyons River, WA has the postcode 6705.What state is West Lyons River in?West Lyons River is in Western Australia (WA).Does postcode 6705 cover more than one suburb?Yes. Postcode 6705 covers 4 localities, so the postcode alone does not identify West Lyons River. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.