| Henri Romagnesi | |
| Birth Date: | 7 February 1912 |
| Birth Place: | Paris |
| Death Place: | Draveil, Essonne, France |
| Field: | Mycology |
| Known For: | Describing several species in the genus Russula |
| Author Abbrev Bot: | Romagn. |
Henri Charles Louis Romagnesi (7 February 1912 – 18 January 1999) was a French mycologist who was notable for a thorough review and monograph of the agaric genus Entoloma (or Rhodophyllus as it was known in the early 20th century), as well as extensive work on the large genus Russula, of which he described several new species.