Harold B. Barclay (born January 3, 1924) is professor emeritus in anthropology at the University of Alberta, Edmonton, Alberta. His research has focussed on rural society in modern Egypt and the northern Arab Sudan as well as political anthropology and anthropology of religion. He is also commonly acknowledged as a notable writer in anarchist theory, specialising in theories involving the destruction of the state and how society would operate if leaderless.
- Buurri al Lamaab, a suburban village in the Sudan. Cornell studies in anthropology. Ithaca, N.Y.: Cornell University Press, 1964.
- The role of the horse in man's culture. London: J.A. Allen, 1980. ISBN 0-85131-329-9
- Culture: the human way. Calgary. Alta., Canada: Western Publishers, 1986. ISBN 0-919119-11-5
- People without Government: An Anthropology of Anarchy, rev. ed., Seattle: Left Bank Books, 1990. ISBN 0-939306-09-3.
- Culture and anarchism. London: Freedom Press, 1997. ISBN 0-900384-84-0
- The state. London: Freedom Press, 2003. ISBN 1-904491-00-6
- Longing for Arcadia: memoirs of an anarcho-cynicalist anthropologist. Victoria, B.C.: Trafford, 2005. ISBN 1-4120-5679-9