33rd Massachusetts Infantry Regiment
| 33rd Massachusetts Volunteer Infantry | |
|---|---|
Regimental colors of 33rd Massachusetts Volunteers  | |
| Active | August 6, 1862 - July 2, 1865 | 
| Country | United States | 
| Allegiance | Union | 
| Branch | Infantry | 
| Type | Regiment | 
| Engagements | 
  | 
| Commanders | |
| Colonel | Adin B. Underwood | 
| Lieutenant Colonel | Godfrey Rider, Jr. | 
| Massachusetts U.S. Volunteer Infantry Regiments 1861-1865 | ||||
  | 
The 33rd Massachusetts Volunteer Infantry was an infantry regiment that served in the Union Army during the American Civil War.