Postcode 5252 This postcode covers more than one locality. Which one are you after? Brukunga South Australia LGA: Mount Barker Dawesley South Australia LGA: Mount Barker Hay Valley South Australia LGA: Mount Barker Kanmantoo South Australia LGA: Mount Barker Nairne South Australia LGA: Mount Barker Petwood South Australia LGA: Mount Barker