Mary Hanna (née Sutherland) (born 1 December 1954) is an Australian equestrian.
She has represented Australia at six Olympic Games in the equestrian discipline of dressage (Atlanta 1996 with Mosaic, Sydney 2000 and Athens 2004 with Limbo, London 2012 with Sancette, Rio 2016 with Boogie Woogie and Tokyo 2020 with Calanta).
[2] She has qualified for the 2014 FEI World Cup Dressage Final in Lyon, France, where she finished 15th.
In 2016, Hanna qualified once again for the World Cup finals in Gothenburg, Sweden, where she finished 15th.
Later that year she competed at the 2016 Summer Olympics held in Rio de Janeiro, Brazil.
At age of 61, she became the oldest Australian athlete ever to compete at the Olympics, surpassing a fellow equestrian and multiple medalist Bill Roycroft.