Home Postcode finder SA Smithfield Smithfield postcode SA Smithfield is a locality in South Australia covered by postcode 5114. Postcode 5114 State or territory South Australia (SA) Region Sa Subs Near 1 Add a free Smithfield business listing More business listings in Smithfield Businesses in SmithfieldAny Time Fitness - SmithfieldShop 96-600 Main North Road · (08) 8254 8156Auswide Corporate 39 Anderson Walk · 1300028794Auswide Corporate - Server Hosting Services Adelai39 Anderson Walk · 1300028794 Common questionsWhat is the postcode for Smithfield?Smithfield, SA has the postcode 5114.What state is Smithfield in?Smithfield is in South Australia (SA).Does postcode 5114 cover more than one suburb?Yes. Postcode 5114 covers 12 localities, so the postcode alone does not identify Smithfield. Browse other postcodes in South Australia, or widen the search to every Australian postcode.