Joseph P. O'Neil | |
|---|---|
 Brigadier General Joseph P. O'Neil in France, October 1918 | |
| Born | December 27, 1863 Brooklyn, New York State, United States |
| Died | July 27, 1938 (aged 74) Portland, Oregon, U.S. |
| Buried | |
| Allegiance | United States |
| Service |  United States Army Infantry Branch |
| Years of service | 1884–1926 |
| Rank |  Brigadier general |
| Service number | 0-140 |
| Commands | 21st Infantry Regiment 179th Infantry Brigade 90th Division |
| Battles / wars | Spanish–American War Philippine–American War World War I |
| Alma mater | University of Notre Dame |
| Spouse(s) | Nina Troup (m. 1891) |
Joseph Patrick O'Neil (December 27, 1863 – July 27, 1938) was a United States Army officer in the late 19th and early 20th centuries. He served in several conflicts, including World War I.