Alan Morton "Dersh" Dershowitz is an American lawyer, jurist, and political commentator. He is the Felix Frankfurter Professor of Law at Harvard Law School, and is known for his extensive published works, career as an attorney in several high-profile law cases, and commentary on the Arab-Israeli conflict.

He has spent most of his career at Harvard, where, at the age of 28, he became the youngest full professor in its history, until Noam Elkies took the record. Dershowitz still holds the record as the youngest person to become a professor of law there.