Isaac Siegel (April 12, 1880 – June 29, 1947) was a United States Representative from New York.

He commenced practice in New York City thereafter and was appointed special deputy attorney general for the prosecution of election frauds in 1909 and 1910.

During the First World War, he was a member of the overseas commission which visited France and Italy during July and August 1918.

[1] On September 14, 1940, Siegel was appointed to the bench and served as justice of the domestic relations court of New York City until his death.

[1] This article incorporates public domain material from the Biographical Directory of the United States Congress