Home Postcode finder SA Bright Bright postcode SA Bright is a locality in South Australia covered by postcode 5381. Postcode 5381 State or territory South Australia (SA) Region Sa Subs Near 1 Add a free Bright business listing Be the first listing in Bright Common questionsWhat is the postcode for Bright?Bright, SA has the postcode 5381.What state is Bright in?Bright is in South Australia (SA).Does postcode 5381 cover more than one suburb?Yes. Postcode 5381 covers 9 localities, so the postcode alone does not identify Bright. Browse other postcodes in South Australia, or widen the search to every Australian postcode.