John P. Brennan | |
|---|---|
 | |
| 27th Ohio State Treasurer | |
| In office January 13, 1913 – January 11, 1915 | |
| Governor | James M. Cox |
| Preceded by | David S. Creamer |
| Succeeded by | Rudolph W. Archer |
| Personal details | |
| Born | October 20, 1864 Urbana, Ohio, US |
| Died | October 14, 1943 (aged 78) Columbus, Ohio, US |
| Political party | Democratic |
John P. Brennan (October 20, 1864 – October 14, 1943) was a Democratic politician in the U.S. state of Ohio who served as Ohio State Treasurer 1913 to 1915.