Alfred George Gardyne de Chastelain | |
|---|---|
 Alfred Gardyne de Chastelain in 1945 | |
| Born | February 1906 London, UK |
| Died | 1974 Calgary, Alberta, Canada |
| Allegiance |  United Kingdom |
| Service |  British Army |
| Years of service | World War II |
| Rank | Lieutenant-Colonel |
| Unit | Artists' Rifles, Special Operations Executive |
| Awards | DSO, OBE |
Alfred George Gardyne de Chastelain, DSO, OBE (1906–1974) was a British-Canadian businessman, soldier, and secret agent, noted for his actions during World War II. He was the father of Canadian General John de Chastelain.