| Unit Name: | 127th Pennsylvania Infantry Regiment |
| Dates: | August 16, 1862 - May 29, 1863 |
| Country: | United States |
| Allegiance: | Union |
| Branch: | United States Army |
| Battles: | Battle of Fredericksburg Battle of Chancellorsville Battle of Salem Church |
| Commander1: | William W. Jennings |
| Commander1 Label: | Notable Commanders |
The 127th Pennsylvania Infantry Regiment was a regiment in the Union Army during the American Civil War. As part of the Second Corps of the Army of the Potomac, it fought in battles such as Fredericksburg and Chancellorsville.
The 127th Pennsylvania included recruits mainly from Harrisburg and its environs. The regiment was mustered in on August 16, 1862, and first commanded by Colonel William W. Jennings. On August 17, 1862, men of the 59th were assigned to the defense of Washington, D.C., and then, in December 1862, to the Second Corps of the Army of the Potomac.
There is a monument to the 127th Pennsylvania at Fredericksburg and Spotsylvania National Military Park .