Home Postcode finder SA Sefton Park Sefton Park postcode SA Sefton Park is a locality in South Australia covered by postcode 5083. Postcode 5083 State or territory South Australia (SA) Region Sa Subs Near 1 Add a free Sefton Park business listing More business listings in Sefton Park Businesses in Sefton ParkGR PhonesShop 22, Sefton Plaza Shopping Ctr, 239 Main North Road · (08) 8342 0008 Common questionsWhat is the postcode for Sefton Park?Sefton Park, SA has the postcode 5083.What state is Sefton Park in?Sefton Park is in South Australia (SA).Does postcode 5083 cover more than one suburb?Yes. Postcode 5083 covers 3 localities, so the postcode alone does not identify Sefton Park. Browse other postcodes in South Australia, or widen the search to every Australian postcode.