| Birth Date: | August 20, 1887 |
| Birth Place: | Lockport, Illinois, United States |
| Death Date: | July 11, 1911 (aged 23) |
| Death Place: | Joliet, Illinois, United States |
| Height: | 186 cm |
| Weight: | 84 kg |
| Sport: | Athletics |
| Event: | Discus throw |
| Club: | Chicago AA |
| Pb: | DT – 42.06 m (1908) |
| Show-Medals: | yes |
Merritt Hayward Giffin (August 20, 1887 – July 11, 1911) was an American athlete who won a silver medal in the discus throw at the 1908 Summer Olympics. He also won the AAU discus title in 1910.[1]