Seth Williams | |
|---|---|
 Brevet Maj. Gen. Seth Williams | |
| Born | March 22, 1822 Augusta, Maine, U.S. |
| Died | March 23, 1866 (aged 44) Boston, Massachusetts, U.S. |
| Place of burial | Forest Grove Cemetery, Augusta, Maine |
| Allegiance | United States of America Union |
| Service | United States Army Union Army |
| Years of service | 1842–1866 |
| Rank |  Brigadier General Brevet Major General |
| Battles / wars | Mexican-American War American Civil War |
Seth Williams (March 22, 1822 – March 23, 1866) was an American military officer who served as assistant adjutant general of the Union's Army of the Potomac during the American Civil War.