Home Postcode finder SA Port Pirie South Port Pirie South postcode SA Port Pirie South is a locality in South Australia covered by postcode 5540. Postcode 5540 State or territory South Australia (SA) Region SA Outer Suburbs Add a free Port Pirie South business listing Be the first listing in Port Pirie South Common questionsWhat is the postcode for Port Pirie South?Port Pirie South, SA has the postcode 5540.What state is Port Pirie South in?Port Pirie South is in South Australia (SA).Does postcode 5540 cover more than one suburb?Yes. Postcode 5540 covers 14 localities, so the postcode alone does not identify Port Pirie South. Browse other postcodes in South Australia, or widen the search to every Australian postcode.