Home Postcode finder SA Port Gawler Port Gawler postcode SA Port Gawler is a locality in South Australia covered by postcode 5501. Postcode 5501 State or territory South Australia (SA) Region Sa Subs Near 1 Add a free Port Gawler business listing Be the first listing in Port Gawler Common questionsWhat is the postcode for Port Gawler?Port Gawler, SA has the postcode 5501.What state is Port Gawler in?Port Gawler is in South Australia (SA).Does postcode 5501 cover more than one suburb?Yes. Postcode 5501 covers 14 localities, so the postcode alone does not identify Port Gawler. Browse other postcodes in South Australia, or widen the search to every Australian postcode.