Menedemus of Eretria (Greek: Μενέδημος ὁ Ἐρετριεύς; 345/4 – 261/0 BC) was a Greek philosopher and founder of the Eretrian school. He learned philosophy first in Athens, and then, with his friend Asclepiades, he subsequently studied under Stilpo and Phaedo of Elis. Nothing survives of his philosophical views apart from a few scattered remarks recorded by later writers.