Home Postcodes by state WA Thevenard Island Thevenard Island postcode WA Thevenard Island is a locality in Western Australia covered by postcode 6711. Postcode 6711 State or territory Western Australia (WA) Region North West Suburbs Add a free Thevenard Island business listing Be the first listing in Thevenard Island Suburbs near Thevenard IslandStraight-line distance between locality centres.OnslowWA 6710 · 23.3 km Common questionsWhat is the postcode for Thevenard Island?Thevenard Island, WA has the postcode 6711.What state is Thevenard Island in?Thevenard Island is in Western Australia (WA).Does postcode 6711 cover more than one suburb?No. Postcode 6711 covers Thevenard Island only, which is unusual - most Australian postcodes cover several localities.What suburbs are near Thevenard Island?The closest are Onslow (23.3 km). Distances are straight lines between locality centres. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.