John Bloomfield AO (born 12 December 1932) is an Australian sport and sport science academic and author. Bloomfield played a crucial role in the development of the Australian high performance sport system between 1973 and 1989, particularly in relation to the Australian Institute of Sport and the Australian Sports Commission. While active in the above, he lectured and conducted research at the University of Western Australia and, from time to time, in North America and Eastern and Western Europe.