Home Postcode finder SA Nain Nain postcode SA Nain is a locality in South Australia covered by postcode 5360. Postcode 5360 State or territory South Australia (SA) Region Sa Subs Near 1 Add a free Nain business listing Be the first listing in Nain Common questionsWhat is the postcode for Nain?Nain, SA has the postcode 5360.What state is Nain in?Nain is in South Australia (SA).Does postcode 5360 cover more than one suburb?Yes. Postcode 5360 covers 2 localities, so the postcode alone does not identify Nain. Browse other postcodes in South Australia, or widen the search to every Australian postcode.