Home Postcode finder SA South Brighton South Brighton postcode SA South Brighton is a locality in South Australia covered by postcode 5048. Postcode 5048 State or territory South Australia (SA) Region Sa Subs Near 1 Add a free South Brighton business listing Be the first listing in South Brighton Common questionsWhat is the postcode for South Brighton?South Brighton, SA has the postcode 5048.What state is South Brighton in?South Brighton is in South Australia (SA).Does postcode 5048 cover more than one suburb?Yes. Postcode 5048 covers 5 localities, so the postcode alone does not identify South Brighton. Browse other postcodes in South Australia, or widen the search to every Australian postcode.