| Henry Millar | |
| Birth Name: | Henry James Millar |
| Death Date: | 4 April 1959 |
| Clubs1: | Monkstown |
| Repyears1: | 1904-1905 |
| Repteam1: | Ireland |
| Repcaps1: | 4 |
Henry James Millar (died 1959) was an Irish rugby international. He won four caps between 1904 and 1905.
After his playing career he was President of the Leinster Branch of the IRFU in the 1922/23 season as well as President of the IRFU in the 1928/29 season.