Daniel Joseph Riordan (July 7, 1870 – April 28, 1923) was aU.S. representative fromNew York for one term from 1899 to 1901 and for eight additional terms from 1906 to 1923.

He was aDemocrat and a member ofTammany Hall.

Riordan was born inNew York City and attended public schools until 1886, when he enteredManhattan College, from which he graduated in 1890. He engaged in the real-estate business.

Riordan was elected as a Democrat to the56th United States Congress, holding office from March 4, 1899, to March 3, 1901. He was a member of theNew York State Senate (10th D.) from 1903 to 1906, sitting in the126th,127th,128th and129th New York State Legislatures.

Riordan was elected to the59th United States Congress to fill the vacancy caused by the resignation ofTimothy D. Sullivan and on the same day was elected to the60th United States Congress. He was re-elected to the61st and to the seven succeeding Congresses, holding office from November 6, 1906, until his death inWashington, D.C., on April 28, 1923.

He was buried at theCalvary Cemetery inQueens.

• List of members of the United States Congress who died in office (1900–1949)

• United States Congress."Daniel J. Riordan (id: R000264)".Biographical Directory of the United States Congress.

• 1870 births
• 1923 deaths
• Burials at Calvary Cemetery (Queens)
• Manhattan College alumni
• Democratic Party New York (state) state senators
• Politicians from New York City
• Democratic Party members of the United States House of Representatives from New York (state)
• Catholics from New York (state)
• 20th-century members of the New York State Legislature
• 20th-century members of the United States House of Representatives

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