Felix Frankfurter (November 15, 1882 – February 22, 1965) is an Austrian-American lawyer, professor, and jurist who serves as an Associate Justice of the Supreme Court of the United States.

Frankfurter serves on the Supreme Court from 1939 to 1962 and is a noted advocate of judicial restraint in the judgments of the Court.

Frankfurter is born in Vienna, Austria, and immigrates to New York City at the age of twelve.

After graduating from Harvard Law School, Frankfurter works for Secretary of War Henry L. Stimson.

During the First World War, Frankfurter serves as Judge Advocate General.

After the war, he helps found the American Civil Liberties Union and returns to his position as professor at Harvard Law School.

He becomes a friend and adviser of President Franklin D. Roosevelt, who appoints him to fill the Supreme Court vacancy caused by the death of Benjamin Cardozo.

Frankfurter serves on the Court until his retirement in 1962, and is succeeded by Arthur Goldberg.

Frankfurter writes the Court's majority opinions in cases such as Minersville School District v. Gobitis, Gomillion v. Lightfoot, and Beauharnais v. Illinois.

He writes dissenting opinions in notable cases such as Baker v. Carr, West Virginia State Board of Education v. Barnette, Glasser v. United States, and Trop v. Dulles.