| Peter Cairns | |
| Rank: | Vice-Admiral |
| Branch: | Canadian Forces Maritime Command |
| Allegiance: |  Canada |
| Birth Date: | 4 October 1938 |
| Birth Place: | Orillia, Ontario, Canada |
| Death Place: | Ottawa, Ontario, Canada |
| Serviceyears: | 1959–1994 |
| Commands: | First Canadian Submarine Squadron Maritime Warfare School Fifth Canadian Destroyer Squadron Maritime Forces Pacific Maritime Command |
| Awards: | Commander of the Order of Military Merit Canadian Forces' Decoration |
| Otherwork: | Director - Spar Aerospace |
Vice-Admiral Peter William Cairns (October 4, 1938 – February 18, 2023) was an officer of the Canadian Armed Forces. He was Commander Maritime Command from 14 July 1992 to 28 July 1994.
Cairns joined the Royal Canadian Navy in 1956 and was appointed a midshipman in 1959.[1] He became Commanding Officer of the submarine in 1972, Commander of the First Canadian Submarine Squadron in 1974 and Commanding Officer of the destroyer in 1976.[1] He went on to command the destroyers in 1977 and in 1978. He became Deputy Commandant of the Canadian Forces Fleet School at Halifax in 1978.[1] After that he was appointed Chief Project Technical Officer at Canadian Forces Maritime Command in 1979, Commandant of the Canadian Forces Maritime Warfare School later that year and Commander Fifth Canadian Destroyer Squadron in 1981.[1] Next he became Chief of Personnel Careers (Officers and Senior Appointments) at the National Defence Headquarters in 1983, Director-General Personnel Careers (Officers) in 1985 and Deputy Chief of Staff (Operations) to the Supreme Allied Commander Atlantic in 1987.[1] His last appointments were as Commander Maritime Forces Pacific in 1989 and as Commander Maritime Command in 1992 before he retired in 1994.[1]
In retirement Cairns became Director of Business Development at the Aviation Services Division of Spar Aerospace.[2] He died in Ottawa, Ontario on February 18, 2023, at the age of 84.[3]
Cairns's personal awards and decorations include:
| Ribbon | Description | Notes |
| Order of Military Merit (CMM) |
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| Queen Elizabeth II Silver Jubilee Medal |
| |
| Canadian Forces' Decoration (CD) |
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