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Portrait of Denis O’Leary, Former U.S. Representative for New York District 2
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Historical · U.S. House · New York · District 2

Denis O’Leary

Former U.S. Representative · New York District 2 · 1913–1915 · Democratic

Denis O’Leary represented New York's District 2 in the United States House of Representatives (1913–1915) for the Democratic party. The page below collects sourced biographical facts, term history, committee roles, and provenance for O’Leary.

Bioguide ID: O000064

Key facts

Full name
Denis O’Leary
State
New York
District
District 2
Party
Democratic
House service
1913–1915
First House term
1913
Status
Left office
Current term ends
Born
1863
Bioguide ID
O000064
Committee assignments
Dataset version
1.20260606

Biographical narrative

870 words · sourced from the Wikipedia REST extract

Denis O'Leary was an American educator, lawyer, and politician who served as a U.S. Representative for New York's 2nd congressional district. A member of the Democratic Party, O'Leary's congressional tenure lasted from 1913 to 1914, after which he continued his public service as the district attorney for Queens County. His career spanned various roles in public service and law, reflecting a commitment to his community and the legal profession.

Early life and career

Denis O'Leary was born on January 22, 1863, in Manhasset, a community located on Long Island, New York. His early life in this region would shape his future endeavors in education and public service. O'Leary's educational journey began in the public school system, where he not only received his education but also later took on the role of an educator himself. This experience in the classroom likely influenced his understanding of the importance of education in fostering civic responsibility and community engagement.

In pursuit of higher education, O'Leary attended New York University, where he enrolled in the law school. He graduated in 1890, marking the beginning of his legal career. Upon completing his studies, he was admitted to the bar in the same year and began practicing law in New York City. His legal career provided him with a foundation in the law that would serve him well in his future political endeavors.

O'Leary's early career included significant roles in municipal government. He served as assistant corporation counsel for New York City in 1905 and 1906, a position that involved providing legal advice to the city government and representing it in legal matters. This role allowed him to gain valuable experience in public service and municipal law. Following this, he was appointed as the commissioner of public works for Queens Borough from 1911 to 1912. In this capacity, he oversaw infrastructure projects and public works initiatives, further solidifying his reputation as a dedicated public servant.

House tenure

Denis O'Leary's political career advanced when he was elected as a Democrat to the United States House of Representatives. He began his term on March 4, 1913, representing New York's 2nd congressional district. His election to the Sixty-third Congress marked a significant milestone in his career, as he transitioned from local government to the national legislative arena. During his time in Congress, O'Leary was involved in the legislative process, contributing to discussions and decisions that would impact his constituents and the nation.

O'Leary's congressional tenure lasted until December 31, 1914, when he resigned from his position. The reasons for his resignation were tied to his ambition to serve in a different capacity within the legal and political framework of Queens County. His time in the House of Representatives, although brief, was a critical period in which he engaged with national issues and represented the interests of his district.

Following his resignation from Congress, O'Leary continued to serve the public in a prominent role as the district attorney for Queens County. He held this position from 1915 to 1921, during which he was responsible for prosecuting criminal cases and overseeing legal proceedings within the county. His experience in the House of Representatives likely informed his approach to law enforcement and public safety during his tenure as district attorney.

Legislative focus and committees

While specific details regarding Denis O'Leary's legislative focus and committee assignments during his time in Congress are not extensively documented, it can be inferred that his background in law and public works would have influenced his priorities as a legislator. As a member of the Democratic Party, O'Leary would have aligned with the party's platform and legislative goals of the time, which often included issues related to labor rights, infrastructure development, and social welfare.

Given his previous experience as commissioner of public works, it is likely that O'Leary had a particular interest in legislation related to infrastructure and public services. His understanding of the needs of his constituents in Queens County would have guided his efforts to advocate for projects that would benefit the community, such as improvements to transportation, sanitation, and public facilities.

In addition to infrastructure, O'Leary's legal background may have led him to engage with issues surrounding justice and law enforcement. His subsequent role as district attorney further underscores his commitment to public safety and the legal system. As a legislator, he would have been positioned to address concerns related to crime, legal reform, and the administration of justice, reflecting the priorities of his constituents.

Denis O'Leary's career in public service extended beyond his time in Congress. After leaving the House of Representatives, he returned to the practice of law, where he continued to contribute to the legal community until his retirement in 1929. His extensive career in both law and politics illustrates a dedication to serving the public and addressing the needs of his community.

O'Leary passed away on September 27, 1943, in Douglaston, Queens County, New York. His legacy includes his contributions to education, law, and public service, reflecting a life committed to the betterment of his community and the principles of democracy. Through his various roles, O'Leary exemplified the responsibilities of public service and the impact that dedicated individuals can have on their communities and the nation as a whole.

Notable legislation

Sponsored and co-sponsored legislation for Denis O’Leary is pending operator curation. The biographical narrative above carries the same provenance trail until per-bill rows are written.

Sources

  1. [1]https://en.wikipedia.org/wiki/Denis_O'LearyWikipedia · retrieved 2026-06-06

Notable quotes

Sourced quotes for Denis O’Leary are pending operator curation. Narrative-scope provenance remains attached below.

Sources

  1. [1]https://en.wikipedia.org/wiki/Denis_O'LearyWikipedia · retrieved 2026-06-06

Key positions

Curated policy positions for Denis O’Leary are pending operator review. The biographical narrative above carries the same provenance trail until per-topic positions are written.

Sources

  1. [1]https://en.wikipedia.org/wiki/Denis_O'LearyWikipedia · retrieved 2026-06-06

Terms served

  1. 19131915U.S. House · Term 1 · Democratic

Sources & provenance

Every attributable claim above carries a per-section [N] marker that resolves to the corresponding URL below. Each entry records the upstream provider, the canonical URL, and the timestamp at which the source was retrieved by the ingest pipeline.

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