Home Postcode finder SA Ardrossan Ardrossan postcode SA Ardrossan is a locality in South Australia covered by postcode 5571. Postcode 5571 State or territory South Australia (SA) Region Sa Subs Near 1 Add a free Ardrossan business listing More business listings in Ardrossan Businesses in ArdrossanArdrossan Area School14 Second St · 08 88373025 Common questionsWhat is the postcode for Ardrossan?Ardrossan, SA has the postcode 5571.What state is Ardrossan in?Ardrossan is in South Australia (SA).Does postcode 5571 cover more than one suburb?Yes. Postcode 5571 covers 9 localities, so the postcode alone does not identify Ardrossan. Browse other postcodes in South Australia, or widen the search to every Australian postcode.