Gustav Gottheil (May 28, 1827, Pinne/Pniewy, Grand Duchy of Posen, Prussia – April 15, 1903, New York City) was a Prussian-born American rabbi.
He was educated in Posen under Rabbi Solomon Plessner, and later continued his studies at the universities of Berlin and Jena (Ph.D.), receiving in the meanwhile his "hattarat hora'ah" in the former city from Samuel Holdheim, whose assistant he became (1855).
Two of his most noteworthy sermons preached in Manchester were on the slavery question, attacking those who had declared the institution to be sanctioned by Mosaic law.
In 1889 he started the first Sisterhood of Personal Service, a philanthropic organization affiliated with Temple Emanu-El which served as a model for similar institutions elsewhere.
Dr. Gottheil's sympathies and interests were broadly universalist, as evidenced by his connection with various non-Jewish institutions as well as by many of his sermons and writings.
Unlike most Reform Jews of the time, Rabbi Gottheil was a supporter of Zionism and attended the First Zionist Congress in Basle, Switzerland.