Grenier
Grenier is a surname. It is a French word for attic, loft, or granary. Notable people with the surname include:
- Adrian Grenier
 - Angèle Grenier, Canadian maple syrup producer
 - Auguste Jean François Grenier (1814–1890), French doctor and entomologist
 - Clément Grenier
 - Eustace Grenier
 - Hugo Grenier, French tennis player
 - Jacques de Grenier (1736–1803), French Navy officer
 - Jean Charles Marie Grenier (1808–1875), French botanist and naturalist
 - John Grenier
 - Louis Grenier, fictional character
 - Martin Grenier
 - Paul Grenier (1768–1827), French general
 - Philippe Grenier
 - Richard Grenier (disambiguation)
 - Robert Grenier (CIA officer)
 - Robert Grenier (poet)
 - Roger Grenier
 - Suzanne Blais-Grenier
 - Sylvain Grenier
 - Walter I Grenier, Lord of Caesarea
 - Zach Grenier