| Leslie William Cannon | |
| Nickname: | "Bull" |
| Birth Date: | 9 April 1904 |
| Death Place: | Princess Mary Hospital, RAF Halton, Buckinghamshire |
| Placeofburial: | Penn, Buckinghamshire |
| Allegiance: | United Kingdom |
| Branch: | Royal Air Force |
| Serviceyears: | 1920–58 |
| Rank: | Air Vice-Marshal |
| Commands: | Commander-in-Chief Royal Pakistan Air Force (1951–55) RAF Staff College, Andover (1948–49) No. 85 Group (1946–47) No. 2 Group (1946) No. 138 Wing (1943) RAF Watton (1942–43) No. 5 Squadron (1937–38) |
| Battles: | North-West Frontier Second World War |
| Awards: | Companion of the Order of the Bath Commander of the Order of the British Empire Mentioned in dispatches (4) Silver Star (United States) |
| Spouse: | Beryl Heyworth |
Air Vice-Marshal Leslie William Cannon, (9 April 1904 – 27 January 1986) was a senior Royal Air Force officer. He served as Commander-in-Chief of the Royal Pakistan Air Force from 1951 to 1955.
Cannon enlisted in the Royal Air Force (RAF) in the second entry of aircraft apprentices in 1920, and was commissioned as a pilot in 1925.
From 1948 until late 1949, Cannon was Assistant Commandant and then Commandant of the RAF Staff College, Andover.
He served as a Flight Commander in No. 60 Squadron RAF and then Officer Commanding No. 5 Squadron RAF on the North-West Frontier of India in the 1930s. Eventually attaining the rank of air vice-marshal (the first apprentice to achieve air rank), he served as Commander-in-Chief of the Royal Pakistan Air Force from 7 May 1951 to 19 June 1955.
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