Haddon Corner
| Haddon Corner | |
|---|---|
| Survey mark at Haddon Corner, 2019 | |
| Location | South-West Queensland, on the border corner with South Australia, Tanbar, Shire of Barcoo, Queensland, Australia | 
| Coordinates | 25°59′47″S 140°59′58″E / 25.9964°S 140.9994°E | 
| Design period | 1870s - 1890s (late 19th century) | 
| Official name | Haddon Corner | 
| Type | state heritage | 
| Designated | 9 November 2012 | 
| Reference no. | 602807 | 
Haddon Corner is a heritage-listed site in Tanbar, Shire of Barcoo, Queensland, Australia. It is in outback Channel Country at South-West Queensland, on the border corner with South Australia. It was added to the Queensland Heritage Register on 9 November 2012.
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.