Home Postcode finder SA Emu Downs Emu Downs postcode SA Emu Downs is a locality in South Australia covered by postcode 5381. Postcode 5381 State or territory South Australia (SA) Region Sa Subs Near 1 Add a free Emu Downs business listing Be the first listing in Emu Downs Common questionsWhat is the postcode for Emu Downs?Emu Downs, SA has the postcode 5381.What state is Emu Downs in?Emu Downs is in South Australia (SA).Does postcode 5381 cover more than one suburb?Yes. Postcode 5381 covers 9 localities, so the postcode alone does not identify Emu Downs. Browse other postcodes in South Australia, or widen the search to every Australian postcode.