Home Postcode finder SA Porky Flat Porky Flat postcode SA Porky Flat is a locality in South Australia covered by postcode 5222. Postcode 5222 State or territory South Australia (SA) Region Sa Subs Near 2 Add a free Porky Flat business listing Be the first listing in Porky Flat Common questionsWhat is the postcode for Porky Flat?Porky Flat, SA has the postcode 5222.What state is Porky Flat in?Porky Flat is in South Australia (SA).Does postcode 5222 cover more than one suburb?Yes. Postcode 5222 covers 17 localities, so the postcode alone does not identify Porky Flat. Browse other postcodes in South Australia, or widen the search to every Australian postcode.