Jacob Hamburger (November 10, 1826 – October 23, 1911) was a German rabbi and author.
He received his early education in Ratibor, and then attended the yeshivot of Hotzenplotz, Presburg, and Nikolsburg, and the University of Breslau.
In addition to various articles and sermons, he published "Geist der Hagada, Sammlung Hagadischer Aussprüche aus den Talmudim und Midraschim," Leipzig, 1859.
This work, published by the Institut zur Förderung der Israelitischen Literatur, was intended as the first of a series, but was never continued.
It may be regarded as the forerunner of the Jewish encyclopedia which he began to publish in 1862, under the title "Realencyclopädie des Judenthums," of which three volumes appeared.