Home Postcode finder SA Newton Newton postcode SA Newton is a locality in South Australia covered by postcode 5074. Postcode 5074 State or territory South Australia (SA) Region Sa Subs Near 2 Add a free Newton business listing More business listings in Newton Businesses in NewtonAirconditioning Repair Adelaide190 Groge Rd · 0411 110 349City Concrete Pumping5 Antonio Court · 0883654000Complete Food Services Adelaide95 Graves St, Newton SA 5074, Australia · 01300922316 Common questionsWhat is the postcode for Newton?Newton, SA has the postcode 5074.What state is Newton in?Newton is in South Australia (SA).Does postcode 5074 cover more than one suburb?Yes. Postcode 5074 covers 2 localities, so the postcode alone does not identify Newton. Browse other postcodes in South Australia, or widen the search to every Australian postcode.