Dr John MacDonald Falconar Grant, AO, OBE (14 August 1922 – 10 November 2013) was an Australian neurosurgeon and disability sport administrator. He was President of the 2000 Sydney Paralympic Games Organising Committee. He played a leading role in the development of disability sport in Australia.
Grant was born on 14 August 1922 in Sydney. His parents were Chesborough Grant Falconar Grant and Henrietaa Thelma Leary. In 1945, he married Enid Llewlyn at St John's Church Ashfield. They had three children: Stuart, Mandy and Catherine.
Grant was on the Worker's Party New South Wales Senate ticket at the 1975 Australian federal election. He was put on the ticket due to a misunderstanding with John Singleton and asked to be taken off the ticket. Grant was left on the ballot but was not elected.
His autobiography Different theatres : from neurosurgery to sport for people with disabilities published in 2005 provides his insight into his medical and disability sport endeavours.
Grant attended Roseville Public School, Chatswood Intermediate School and North Sydney Boys High School. In 1945, he graduated from the University of Sydney with a Bachelor of Medicine and Bachelor of Surgery with Second Class Honours. Further education included Master of Surgery of the University of Sydney, Fellowship of the Royal Australasian College of Surgeons, Fellowship of the American College of Surgeons, and Fellowship of the Faculty of Rehabilitation Medicine in the Royal Australasian College of Physicians.