In Greek mythology, Thestor (Ancient Greek: Θέστωρ) is a name that may refer to:
Thestor, son of Idmon and Laothoe, grandson of Apollo; some say that Idmon ("the knowing") was his own surname. By Polymela, he was the father of Calchas, Leucippe and Theonoe.
Thestor, a Trojan, who was killed by Ajax.
Thestor, another Trojan, brother of Satnius. They were sons of Enops and a Naiad nymph of the river Satnioeis. Thestor was slain by Patroclus, and Satnius by Ajax the Lesser.
Thestor, father of Alcmaon (not to be confused with Alcmaeon). His son fought at Troy and was killed by Sarpedon with a spear.
