Home Postcode finder SA Dublin Dublin postcode SA Dublin is a locality in South Australia covered by postcode 5501. Postcode 5501 State or territory South Australia (SA) Region Sa Subs Near 1 Add a free Dublin business listing Be the first listing in Dublin Common questionsWhat is the postcode for Dublin?Dublin, SA has the postcode 5501.What state is Dublin in?Dublin is in South Australia (SA).Does postcode 5501 cover more than one suburb?Yes. Postcode 5501 covers 14 localities, so the postcode alone does not identify Dublin. Browse other postcodes in South Australia, or widen the search to every Australian postcode.