Grenier is a surname and may refer to:
- Adrian Grenier
- Eustace Grenier
- Henri-Georges Grenier
- John Grenier
- Louis Grenier, fictional character
- Martin Grenier
- Philippe Grenier
- Richard Grenier
- Robert Grenier, a former CIA officer
- Robert Grenier (poet)
- Roger Grenier
- Suzanne Blais-Grenier
- Sylvain Grenier
- Walter I Grenier, Lord of Caesarea
| This page or section lists people with the surname Grenier. If an internal link intending to refer to a specific person led you to this page, you may wish to change that link by adding the person's given name(s) to the link. |