Colonel Gerald William Lingen "Gerry" Nicholson, (6 January 1902 – 28 February 1980), was a British-Canadian soldier, historian, author, and teacher.
From 1943 until his retirement in 1961, Nicholson served in the Historical Section, Canadian Army, where in 1959 he succeeded Colonel Charles Perry Stacey to become the section's second director.
Nicholson authored numerous histories of Canada's military.
He is best known for his 1962 book Canadian Expeditionary Force, 1914-1919, the only official history of Canada's participation in World War I.