Background
O’Leary, Denis was born on January 22, 1863 in Manhasset, Queens Company, New York, United States. Son of Patrick and Mary (O’Conor) O’L.
O’Leary, Denis was born on January 22, 1863 in Manhasset, Queens Company, New York, United States. Son of Patrick and Mary (O’Conor) O’L.
Bachelor of Laws, New York University, 1890.
Began practice, New York, 1890. Assistant district attorney Queens County, New York, 1909-1911. Assistant Corporate Counsel, Queens Borough, New York, 1904-1906.
Commissioner public works, 1911-1913.
Member 63d Congress (1913-1915), 3d New York District. Resigned December 31, 1914.
District attorney, Queens County, New York, 1915-1920 inclusive.
Member 63d Congress (1913-1915), 3d New York District
Married Ellen G. Quinn, of Lakeville, New York, April.