Moderatus of Gades was a Greek philosopher of the Neopythagorean school, contemporary with Apollonius of Tyana. He wrote a great work on the doctrines of the Pythagoreans, and tried to show that the successors of Pythagoras had made no additions to the views of their founder, but had merely borrowed and altered the phraseology.

He has been given a fictitious importance by some commentators, who have regarded him as the forerunner of the Alexandrian School of philosophy. Zeller has shown that the authority on which this view is based is entirely unsound. Moderatus is thus left as an unimportant though interesting representative of a type of thought which had almost disappeared since the 5th century B.C.

Stobaeus, in his Eclogae, preserves a fragment of his writings.

This article incorporates text from the 1911 Encyclopædia Britannica, which is in the public domain.