Denis O'Leary | |
|---|---|
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| Queens County District Attorney | |
| In office January 1, 1915 – December 31, 1920 | |
| Preceded by | Matthew J. Smith |
| Succeeded by | Dana Wallace |
| Member of the U.S. House of Representatives from New York's 2nd district | |
| In office March 4, 1913 – March 3, 1914 | |
| Preceded by | George H. Lindsay |
| Succeeded by | C. Pope Caldwell |
| Personal details | |
| Born | January 22, 1863 Manhasset, New York, US |
| Died | September 27, 1943 (aged 80) Douglaston, Queens, New York, US |
| Political party | Democratic and Republican |
Denis O'Leary (January 22, 1863 – September 27, 1943) was an American educator, lawyer, and politician who served as Queens County district attorney and for one year as a member of the United States House of Representatives from New York, from 1913 to 1914.