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.