Home Postcode finder SA Port Hughes Port Hughes postcode SA Port Hughes is a locality in South Australia covered by postcode 5558. Postcode 5558 State or territory South Australia (SA) Region Sa Subs Near 1 Add a free Port Hughes business listing Be the first listing in Port Hughes Common questionsWhat is the postcode for Port Hughes?Port Hughes, SA has the postcode 5558.What state is Port Hughes in?Port Hughes is in South Australia (SA).Does postcode 5558 cover more than one suburb?Yes. Postcode 5558 covers 14 localities, so the postcode alone does not identify Port Hughes. Browse other postcodes in South Australia, or widen the search to every Australian postcode.