Home Postcodes by state WA Wannarn Wannarn postcode WA Wannarn is a locality in Western Australia covered by postcode 0872. Postcode 0872 State or territory Western Australia (WA) Region Adelaide Add a free Wannarn business listing Be the first listing in Wannarn Common questionsWhat is the postcode for Wannarn?Wannarn, WA has the postcode 0872.What state is Wannarn in?Wannarn is in Western Australia (WA).Does postcode 0872 cover more than one suburb?Yes. Postcode 0872 covers 81 localities, so the postcode alone does not identify Wannarn. It also appears in 3 states or territories, so it does not identify a state either. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.