John P. Gillis | |
|---|---|
 | |
| Born | September 6, 1803 Wilmington, Delaware |
| Died | February 25, 1873 (aged 69) Wilmington, Delaware |
| Place of burial | |
| Allegiance | United States of America |
| Service |  United States Navy |
| Years of service | 1825–1866 |
| Rank |  Commodore |
| Commands | USS Monticello USS Seminole USS Ossipee |
| Battles / wars | Mexican–American War American Civil War |
John Pritchett Gillis (6 September 1803 – 25 February 1873) was a commodore in the United States Navy. He served in the Navy from 1825 until 1866 and saw military action in the Mexican-American War and the U.S. Civil War.