| 2nd New Hampshire Infantry Regiment | |
|---|---|
| Active | 1861 - August 1864 |
| Country | United States of America |
| Allegiance | New Hampshire & Union |
| Type | volunteer infantry |
| Size | 1,013 |
| Engagements | Bull Run Williamsburg Fair Oaks Second Bull Run Malvern Hill Fredericksburg Gettysburg Cold Harbor |
| Commanders | |
| Notable commanders | Colonel Gilman Marston |
| New Hampshire U.S. Volunteer Infantry Regiments 1861-1865 | ||||
|
2nd New Hampshire Infantry Regiment was the longest-serving volunteer regiment of the State of New Hampshire in the American Civil War.