Home Postcode finder SA Port Wakefield Port Wakefield postcode SA Port Wakefield is a locality in South Australia covered by postcode 5550. Postcode 5550 State or territory South Australia (SA) Region Sa Subs Near 1 Add a free Port Wakefield business listing More business listings in Port Wakefield Businesses in Port WakefieldPort Wakefield Primary School22 Mine St · 08 88671012 Common questionsWhat is the postcode for Port Wakefield?Port Wakefield, SA has the postcode 5550.What state is Port Wakefield in?Port Wakefield is in South Australia (SA).Does postcode 5550 cover more than one suburb?Yes. Postcode 5550 covers 8 localities, so the postcode alone does not identify Port Wakefield. Browse other postcodes in South Australia, or widen the search to every Australian postcode.