J. Barry Mahool | |
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| 36th Mayor of Baltimore | |
| In office 1907–1911 | |
| Preceded by | E. Clay Timanus |
| Succeeded by | James H. Preston |
| Personal details | |
| Born | John Barry Mahool September 14, 1870 Phoenix, Maryland, U.S. |
| Died | July 29, 1935 (aged 64) Baltimore, Maryland, U.S. |
| Political party | Democratic |
John Barry Mahool (September 14, 1870 – July 29, 1935) was the Mayor of Baltimore from 1907 to 1911.