Home Postcode finder WA Barrow Island Barrow Island postcode WA Barrow Island is a locality in Western Australia covered by postcode 6712. Postcode 6712 State or territory Western Australia (WA) Region North West Suburbs Add a free Barrow Island business listing Be the first listing in Barrow Island Common questionsWhat is the postcode for Barrow Island?Barrow Island, WA has the postcode 6712.What state is Barrow Island in?Barrow Island is in Western Australia (WA).Does postcode 6712 cover more than one suburb?No. Postcode 6712 covers Barrow Island only, which is unusual - most Australian postcodes cover several localities. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.