Home Postcode finder SA Naidia Naidia postcode SA Naidia is a locality in South Australia covered by postcode 5354. Postcode 5354 State or territory South Australia (SA) Region Sa Subs Near 1 Add a free Naidia business listing Be the first listing in Naidia Common questionsWhat is the postcode for Naidia?Naidia, SA has the postcode 5354.What state is Naidia in?Naidia is in South Australia (SA).Does postcode 5354 cover more than one suburb?Yes. Postcode 5354 covers 10 localities, so the postcode alone does not identify Naidia. Browse other postcodes in South Australia, or widen the search to every Australian postcode.