Manuel Joël (or Joel; October 19, 1826 – November 3, 1890) was a German Jewish philosopher and preacher.
He showed how Albertus Magnus derived some of his ideas from Maimonides and how Spinoza was indebted to the same writer, as well as to Hasdai Crescas.
These essays were collected in two volumes of Beiträge zur Geschichte der Philosophie (1876), while another two volumes of Blicke in die Religionsgeschichte (1880-1883) threw much light on the development of religious thought in the early centuries of the Christian era.
Though he was no orator, his appeal to the reason was effective, and in their published form his three volumes of Predigten (issued posthumously) found many readers.
Joël was the chief rabbi of the reform Jewish congregation when the New Synagogue was completed in 1872.