Twenty-first regiment Massachusetts Infantry.
| Field and Staff. | Line. | Band. | companies. | Unassigned Recruits. | Totals. | ||||||||||
| A | B | C | D | E | F | G | H | I | K | ||||||
| Killed and died of wounds,— | |||||||||||||||
| Officers, | 1 | 10 | – | – | – | – | – | – | – | – | – | – | – | – | 11 |
| Enlisted men, | – | – | – | 11 | 17 | 18 | 15 | 15 | 8 | 14 | 11 | 17 | 15 | – | 141 |
| Totals, | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 152 |
| Died by accident or disease,— | |||||||||||||||
| Officers, | – | 2 | – | – | – | – | – | – | – | – | – | – | – | – | 2 |
| Enlisted men, | – | – | 1 | 6 | 4 | 4 | 3 | 10 | 9 | 6 | 9 | 9 | 15 | 2 | 78 |
| Totals, | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 80 |
| Died as prisoners,— | |||||||||||||||
| Officers, | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – |
| Enlisted men, | – | – | – | 1 | 3 | 1 | 1 | – | – | 2 | – | 1 | – | – | 9 |
| Total losses,— | |||||||||||||||
| Officers, | 1 | 12 | – | – | – | – | – | – | – | – | – | – | – | – | 13 |
| Enlisted men, | – | – | 1 | 18 | 24 | 23 | 19 | 25 | 17 | 22 | 20 | 27 | 30 | 2 | 228 |
| Totals, | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 241 |
| 1862. | |||||||||||||||
| Feb. 8, Roanoke Island, N. C. | – | – | – | – | 3 | 4 | 3 | – | – | 2 | – | – | 1 | – | 13 |
| Mar. 14, New Berne,N. C., | – | 1 | – | 2 | 3 | 3 | – | 2 | 1 | – | 4 | 3 | 4 | – | 23 |
| April 19, Camden, N. C., | – | – | – | – | 1 | 2 | – | – | – | 1 | – | – | – | – | 4 |
| Sept. 1, Chantilly, Va., | 1 | 5 | – | 3 | 2 | 5 | 6 | 3 | 3 | 1 | 2 | 7 | 1 | – | 39 |
| Sept. 17, Antietam, Md., | – | 1 | – | – | – | – | 2 | 2 | – | 2 | – | 1 | 2 | – | 10 |
| Dec. 13, Fredericksburg, Va. | – | – | – | 1 | 4 | – | – | 2 | – | 1 | 1 | 2 | 1 | – | 12 |
| Place unknown, | – | – | – | – | – | – | – | – | – | – | 1 | – | – | – | 1 |
| 1863. | |||||||||||||||
| Nov. 24-29, Siege of Knoxville, Tenn. | – | – | – | – | – | – | 1 | 1 | – | 1 | – | – | 1 | – | 4 |
| 1864. | |||||||||||||||
| May 6, Wilderness, Va., | – | – | – | 1 | – | 1 | – | – | – | 1 | – | – | – | – | 3 |
| May 12-18, Spotsylvania,Va., | – | – | – | – | – | 1 | – | – | – | 2 | 1 | – | 1 | – | 5 |
| May 31–June 1, Shady Grove Church, Va. | – | – | – | 1 | – | – | – | – | – | – | – | – | 2 | – | 3 |
| June 2, Cold Harbor (Bethesda Church),Va. | – | – | – | – | 2 | 1 | – | 2 | 1 | 2 | 2 | 1 | 1 | – | 12 |
| June 16-17, Petersburg, Va., | – | 1 | – | 2 | – | – | – | 1 | – | 1 | – | – | – | – | 5 |
| June 29-July 23, Before Petersburg, Va. | – | – | – | 1 | – | 1 | – | – | 1 | – | – | – | – | – | 3 |
| July 30, Crater, Petersburg, Va. | – | 1- | – | – | – | – | – | 1 | 2 | – | – | – | 1 | – | 5 |
| Aug. 19, Weldon Railroad, | – | – | – | – | 2 | – | 1 | – | – | – | – | 1 | – | – | 4 |
| Sept. 30, Poplar Spring Church, Va. | – | 1 | – | – | – | – | 2 | – | – | – | – | 1 | – | – | 4 |
| Place unknown, | – | – | – | – | – | – | – | 1 | – | – | – | 1 | – | – | 2 |
