| Louis Hillier | |
| Birth Name: | Louis Édouard Joseph Hillier |
| Birth Date: | 9 February 1871 |
| Birth Place: | Besançon, France |
| Death Place: | Latin: idem |
| Author Abbrev Bot: | Hillier |
Louis Édouard Joseph Hillier (9 February 1871, Besançon, France – 14 March 1962, Latin: idem) was a French bryologist and botanist.