Osmond Fraenkel (Oct. 17, 1888-May 17, 1983) was a United States attorney who served as general counsel for the American Civil Liberties Union.
Fraenkel was born in New York City on Oct. 17, 1888. He attended the Horace Mann School and Harvard College, then graduated from Columbia Law School in 1911. He then entered private practice.
Fraenkel first came to notoriety as the attorney for the Scottsboro boys. Fraenkel was the attorney for Harry Bridges and Bertrand Russell in their legal cases. In De Jonge v. Oregon he defended a client accused of criminal syndicalism after this person had spoken at a meeting of the communist party. He defended Consumers Union's pamphlet on contraception from Frank Comerford Walker's opinion that it was obscene. Other cases argued include United States v. Richardson (1974), Kramer v. Union Free School District No. 15 (1969), Turner v. New York (1967), Trop v. Dulles (1958), Bridges v. California (1941), Schneider v. State of New Jersey (1939), and De Jonge v. Oregon (1937).
Fraenkel was one of the organizing co-founders of the National Lawyers Guild and present at pre-formation meeting in New York City on December 1, 1936.