Home Postcode finder SA Old Reynella Old Reynella postcode SA Old Reynella is a locality in South Australia covered by postcode 5161. Postcode 5161 State or territory South Australia (SA) Region Adelaide Add a free Old Reynella business listing Be the first listing in Old Reynella Common questionsWhat is the postcode for Old Reynella?Old Reynella, SA has the postcode 5161.What state is Old Reynella in?Old Reynella is in South Australia (SA).Does postcode 5161 cover more than one suburb?Yes. Postcode 5161 covers 3 localities, so the postcode alone does not identify Old Reynella. Browse other postcodes in South Australia, or widen the search to every Australian postcode.