| John O'Brien | |
| Rank: | Vice-Admiral |
| Branch: | Canadian Forces |
| Allegiance: |  Canada |
| Birth Date: | 16 December 1918 |
| Death Date: | 24 March 1996 |
| Birth Place: | Hove, Sussex |
| Death Place: | Ottawa, Ontario |
| Serviceyears: | 1935–1973 |
| Battles: | Second World War |
| Commands: | Maritime Command NATO Defense College |
| Awards: | Officer of the Order of Canada Canadian Forces' Decoration |
Vice Admiral John Charles O'Brien OC, CD (16 December 1918 – 24 March 1996) was a Canadian Forces officer who served as Commander Maritime Command from 19 July 1966 to 6 July 1970.
O'Brien joined the Royal Canadian Navy in 1935.[1] He was in action off Norway in 1939, commanded a small boat at the Dunkirk evacuation in 1940, served as a Signals Officer for the Allied invasion of Sicily in 1943 during the Second World War.[1] He became Director Naval Training in 1955, Director Naval Communications in 1957 and Commanding Officer of the aircraft carrier in 1959.[1] He went on to be Naval Member of the Canadian Joint Staff in Washington, D.C. in 1961, Senior Canadian Officer Afloat (Atlantic) in 1964 and Commander Maritime Command in 1966.[1] His last appointment was as Commandant of the NATO Defense College in Rome in 1970 before retiring in 1973.[1]
O'Brien married Stephanie Frances Swire; she died on 2 October 2006.[2]
Obrien's personal awards and decorations include the following:
| Ribbon | Description | Notes | ||||
| Order of Canada (OC) |
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| Canadian Forces' Decoration (CD) |
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