Ecphantus or Ecphantos (Ancient Greek: Ἔκφαντος) is a shadowy Greek pre-Socratic philosopher. He may not have actually existed. He is identified as a Pythagorean of the 4th century BCE, and as a supporter of the heliocentric theory. Described as from Syracuse, this may or may not be the same figure as the attested Ecphantus of Croton.
- ^ Some scholars have argued that Hicetas and Ecphantus, both of Syracuse, were not historical figures at all but rather characters in dialogues written by Heraclides of Pontus. From the Stanford Encyclopedia of Philosophy, article Pythagoreanism.