Home Postcode finder SA Tarnma Tarnma postcode SA Tarnma is a locality in South Australia covered by postcode 5413. Postcode 5413 State or territory South Australia (SA) Region Sa Subs Near 1 Add a free Tarnma business listing Be the first listing in Tarnma Common questionsWhat is the postcode for Tarnma?Tarnma, SA has the postcode 5413.What state is Tarnma in?Tarnma is in South Australia (SA).Does postcode 5413 cover more than one suburb?Yes. Postcode 5413 covers 9 localities, so the postcode alone does not identify Tarnma. Browse other postcodes in South Australia, or widen the search to every Australian postcode.