Home Postcode finder SA Nundroo Nundroo postcode SA Nundroo is a locality in South Australia covered by postcode 5690. Postcode 5690 State or territory South Australia (SA) Region SA Outer Suburbs Add a free Nundroo business listing Be the first listing in Nundroo Common questionsWhat is the postcode for Nundroo?Nundroo, SA has the postcode 5690.What state is Nundroo in?Nundroo is in South Australia (SA).Does postcode 5690 cover more than one suburb?Yes. Postcode 5690 covers 19 localities, so the postcode alone does not identify Nundroo. Browse other postcodes in South Australia, or widen the search to every Australian postcode.