John McNeil | |
|---|---|
 Brig. Gen. John McNeil | |
| Born | February 14, 1813 Halifax, Nova Scotia, Canada |
| Died | June 8, 1891 (aged 78) St. Louis, Missouri, United States |
| Place of burial | Bellefontaine Cemetery St. Louis, Missouri |
| Allegiance | United States of America Union |
| Service/ | United States Army Union Army |
| Years of service | 1861–1865 |
| Rank |  Brigadier General Brevet Major General |
| Commands | 2nd Missouri Cavalry Regiment |
| Battles/wars | American Civil War |
| Signature | .png){kind=small} |
John McNeil (February 14, 1813 – June 8, 1891) was a general in the Union Army during the American Civil War. He was most noted for his role in the Palmyra Massacre and other acts of alleged brutality, as well as his participation in the Battle of Westport, the largest battle west of the Mississippi River. For his role in the Palmyra massacre, he was given the nickname "Butcher of Palmyra".