Home Postcode finder SA Brinkley Brinkley postcode SA Brinkley is a locality in South Australia covered by postcode 5253. Postcode 5253 State or territory South Australia (SA) Region Sa Subs Near 2 Add a free Brinkley business listing Be the first listing in Brinkley Common questionsWhat is the postcode for Brinkley?Brinkley, SA has the postcode 5253.What state is Brinkley in?Brinkley is in South Australia (SA).Does postcode 5253 cover more than one suburb?Yes. Postcode 5253 covers 25 localities, so the postcode alone does not identify Brinkley. Browse other postcodes in South Australia, or widen the search to every Australian postcode.