Timocreon of Ialysus in Rhodes (Τιμοκρέων) was a Greek lyric poet who flourished about 480 BC, at the time of the Persian Wars. His poetry survives only in a very few fragments and he has received less attention from modern scholars than he deserves. He seems to have composed convivial verses for drinking parties. However he is remembered particularly for his bitter clashes with Themistocles and Simonides over the issue of his medizing (siding with the Persian invaders), for which he had been banished from his home around the time of the Greek victory at the Battle of Salamis. He was also an athlete of some distinction and reputedly a glutton.

An epitaph for him, appearing in the Palatine Anthology, was credited to his rival, Simonides: "After much drinking, much eating and much slandering, I, Timocreon of Rhodes, rest here."