Home Postcode finder SA Eba Eba postcode SA Eba is a locality in South Australia covered by postcode 5320. Postcode 5320 State or territory South Australia (SA) Region SA Outer Suburbs Add a free Eba business listing Be the first listing in Eba Common questionsWhat is the postcode for Eba?Eba, SA has the postcode 5320.What state is Eba in?Eba is in South Australia (SA).Does postcode 5320 cover more than one suburb?Yes. Postcode 5320 covers 13 localities, so the postcode alone does not identify Eba. Browse other postcodes in South Australia, or widen the search to every Australian postcode.