Charles Barry Osmond FAA FRS is an Australian plant biologist.
Barry Osmond was born in Cooranbong, New South Wales in 1939. He studied at the University of New England, earning a BSc in 1961 and MSc in 1963, followed by a PhD from the University of Adelaide in 1965. In 1967 he joined the Australian National University as a Postdoctoral Research Fellow. He was Professor of Environmental Biology 1978–1987, Director, Research School of Biological Sciences 1991-1998 and Professor, Photo Bioenergetics Group 1998–2001.