William Alexander (Canadian soldier)
- for other men named William Alexander, see William Alexander (disambiguation)
William Alexander (18 September 1880 – 18 October 1917) was a Canadian soldier who served with the 10th Battalion, CEF in France during the First World War. His execution by firing squad following a charge of desertion sparked controversy in Canada. He was one of 25 Canadian soldiers executed during the course of the Great War.
The case of Sergeant Alexander is studied in detail in the book Gallant Canadians: The Story of the 10th Battalion, CEF 1914-1919 by Daniel G. Dancocks.