George Mackaness OBE (9 May 1882 – 3 December 1968), born in Sydney, was a distinguished Australian educator, historian author, bibliographer and bibliophile.

He trained as a teacher and spent many years as English master at Fort Street Boys' High School, Sydney.

He was on the board of the Commonwealth Literary Fund, and a trustee of the Public Library of New South Wales.

He wrote over 70 books and journal articles, including a life of William Bligh (1930) and Arthur Phillip (1937).

Between 1935 and 1962, he edited and privately published in limited editions, a series of Australian Historical Monographs (later reprinted by Review Publications, Dubbo), consisting of valuable original research plus reprints of key but forgotten historical pamphlets.