Frank Grenier | |
|---|---|
| Born | 27 August 1934 |
| Allegiance |  United Kingdom |
| Service |  Royal Navy |
| Years of service | 1952–1989 |
| Rank | Rear Admiral |
| Commands | HMS Ambush HMS Valiant HMS Churchill 3rd Submarine Squadron HMS Liverpool |
| Battles / wars | Falklands War |
| Awards | Companion of the Order of the Bath |
| Spouse(s) | Jane Susan Bradshaw |
| Other work | Glass Engraver |
| Website | grenier |
Rear Admiral Peter Francis Grenier CB (born 27 August 1934) is a former Royal Navy officer who served as Flag Officer Submarines.