Home Postcode finder SA Port Paterson Port Paterson postcode SA Port Paterson is a locality in South Australia covered by postcode 5700. Postcode 5700 State or territory South Australia (SA) Region SA Outer Suburbs Add a free Port Paterson business listing Be the first listing in Port Paterson Common questionsWhat is the postcode for Port Paterson?Port Paterson, SA has the postcode 5700.What state is Port Paterson in?Port Paterson is in South Australia (SA).Does postcode 5700 cover more than one suburb?Yes. Postcode 5700 covers 8 localities, so the postcode alone does not identify Port Paterson. Browse other postcodes in South Australia, or widen the search to every Australian postcode.