Brian McKenna (born August 8, 1945 in Montreal) is a Canadian documentary filmmaker.
He is best known for his provocative prize-winning films on Canadian history and exploration of the world at war.
McKenna is a founding producer of CBC's Oscar and Emmy award-winning documentary program, the fifth estate, where he worked from 1975 to 1988.
McKenna is a former parliamentary correspondent for the Montreal Star.
He has been a frequent collaborator with his brother Terence, also a filmmaker, in particular on the 3-part series The Valour and the Horror.
The most controversial segment in the series concerned strategic bombing during World War II.McKenna's lasting contributions have been provocative, prize-winning reporting of Canada's wars, including the War of 1812, the First and Second World Wars, and Korea.