Hall Barry Greenland (born 1944), is an Australian political activist. He participated in the Freedom Rides. He studied history at the University of Sydney in the 1960s and was a president of the Labor Club in 1964. As an editor of Honi Soit in 1966 he was highly critical of the war in Vietnam. During the 1970s he wrote for Rolling Stone and The Digger. He served on Leichhardt Council and is the recipient of a Walkley Award. In 2013 he was the Australian Greens candidate for Grayndler.He is the author of a biography of Nick Origlass, Red Hot: The Life and Times of Nick Origlass.