Thomas Guthrie Marquis (July 7, 1864-April 1, 1936) was a Canadian historian. Marquis was born in Chatham, New Brunswick. His parents were Hugh P. Marquis and Mary McIndoe. His father was employed in the shipbuilding industry. He attended school in Chatham but at age 16 he went to Queen’s University, Kingston, where he graduated in 1889. He became a teacher, but he retired in 1901 to devote himself to literature. He worked briefly in Ottawa as an editorial writer with the Ottawa Free Press but went to Toronto where he worked as a freelance writer. He was office editor of Canada and Its Provinces (1914-15), a publication in 22 volumes on the history of Canada.