Aaron David Bernstein (6 April 1812, Danzig — 12 February 1884, Berlin) was a German Jewish scientist, author and reformer.
In the middle of the 19th century Bernstein took an active share in the movement for synagogue reform in Germany. He was the author of two Ghetto stories, Vogele der Maggid and Mendel Gibbor, being one of the originators of this genre of modern fiction. He was also a publicist, and his History of Revolution and Reaction in Germany (3 vols., 1883-1884) was a collection of important political essays.