Home Postcode finder WA Southern River Southern River postcode WA Southern River is a locality in Western Australia covered by postcode 6110. Postcode 6110 State or territory Western Australia (WA) Region North West Suburbs Add a free Southern River business listing More business listings in Southern River Businesses in Southern RiverBailey Fitness7/714 Ranford Road, Southern River WA, Australia · 9394 0700Bletchley Park Primary SchoolLot 5003 Balfour St · 08 93940955Boardwalk Fans and Lightingshop 1/712 Ranford Road, Southern River WA, Australia · 0894908577 Common questionsWhat is the postcode for Southern River?Southern River, WA has the postcode 6110.What state is Southern River in?Southern River is in Western Australia (WA).Does postcode 6110 cover more than one suburb?Yes. Postcode 6110 covers 4 localities, so the postcode alone does not identify Southern River. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.