Daniel Joseph Riordan (July 7, 1870 – April 28, 1923) was a U.S. Representative from New York for one term from 1899 to 1901 and for eight additional terms from 1906 to 1923.
Riordan was born in New York City and attended public schools until 1886, when he entered Manhattan College, from which he graduated in 1890. He engaged in the real-estate business.