Home Postcode finder SA Port Gibbon Port Gibbon postcode SA Port Gibbon is a locality in South Australia covered by postcode 5602. Postcode 5602 State or territory South Australia (SA) Region SA Outer Suburbs Add a free Port Gibbon business listing Be the first listing in Port Gibbon Common questionsWhat is the postcode for Port Gibbon?Port Gibbon, SA has the postcode 5602.What state is Port Gibbon in?Port Gibbon is in South Australia (SA).Does postcode 5602 cover more than one suburb?Yes. Postcode 5602 covers 8 localities, so the postcode alone does not identify Port Gibbon. Browse other postcodes in South Australia, or widen the search to every Australian postcode.