Jakob Guttmann (22 April 1845 in Beuthen, Oberschlesien – 29 September 1919 in Breslau) was a German-Jewish philosopher of religion (Religionsphilosoph) and rabbi.
In 1910, he was elected chairman of the Rabbinical Union in Germany, a post he held until 1919.
He also conducted active academic research, specializing in the study of the works of medieval Jewish theologians and philosophers.
These studies included Abraham ibn Daud, Saadia Gaon, Solomon ibn Gabirol, Maimonides, and Isaac Abarbanel as well as works on the influence of Medieval Jewish philosophy on the views of Christian philosophers such as Thomas Aquinas and Duns Scotus.
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