AUS map with named state corners
Haddon Corner  is the north-eastern corner of the state of South Australia, where it meets with the border of Queensland. The point is located in the outback Channel Country district.
It was first surveyed by Augustus Poeppel in 1880. Haddon Corner lies at the intersection of the 26th parallel south circle of latitude and the 141st meridian.
Haddon Corner is a heritage-listed site, having been listed on the Queensland Heritage Register in 2012.
Coordinates: 25°59′47″S 140°59′58″E / 25.99637644°S 140.99939430°E