Haldimand Sumner Putnam | |
|---|---|
 | |
| Born | October 15, 1835 Cornish, New Hampshire |
| Died | July 18, 1863 (aged 27) Fort Wagner, South Carolina |
| Allegiance |  Union |
| Service |  United States Army |
| Years of service | 1857–1863 |
| Rank |  Brevet Colonel |
| Commands |  7th New Hampshire Volunteer Regiment |
| Battles / wars | American Civil War |
Haldimand Sumner Putnam (October 15, 1835 – July 18, 1863) was a brevet colonel in the Union Army during the American Civil War. He was killed at the Second Battle of Fort Wagner.