Home Postcode finder SA Sunnybrae Sunnybrae postcode SA Sunnybrae is a locality in South Australia covered by postcode 5422. Postcode 5422 State or territory South Australia (SA) Region SA Outer Suburbs Add a free Sunnybrae business listing Be the first listing in Sunnybrae Common questionsWhat is the postcode for Sunnybrae?Sunnybrae, SA has the postcode 5422.What state is Sunnybrae in?Sunnybrae is in South Australia (SA).Does postcode 5422 cover more than one suburb?Yes. Postcode 5422 covers 13 localities, so the postcode alone does not identify Sunnybrae. Browse other postcodes in South Australia, or widen the search to every Australian postcode.