Home Postcode finder SA Northern Heights Northern Heights postcode SA Northern Heights 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 Northern Heights business listing Be the first listing in Northern Heights Common questionsWhat is the postcode for Northern Heights?Northern Heights, SA has the postcode 5253.What state is Northern Heights in?Northern Heights 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 Northern Heights. Browse other postcodes in South Australia, or widen the search to every Australian postcode.