Myrto (; ; fl. 5th century BC) was, according to some accounts, a wife of Socrates.
The original source for the claim that she was Socrates' wife appears to have been a work by Aristotle called On Being Well-Born, although Plutarch expresses doubt that the work is genuine. She was apparently the daughter, or, more probably, the granddaughter of Aristides.
Although Diogenes Laërtius describes Myrto as Socrates' second wife living alongside Xanthippe, Myrto was presumably a common-law wife, and Plutarch describes Myrto as merely living "together with the sage Socrates, who had another woman but took up this one as she remained a widow due to her poverty and lacked the necessities of life." Athenaeus and Diogenes Laërtius report that Hieronymus of Rhodes attempted to confirm the story by pointing to a temporary decree the Athenians passed:
Neither Plato nor Xenophon mention Myrto, and not everyone in ancient times believed the story: according to Athenaeus, Panaetius "refuted those who talk about the wives of Socrates."
In Greek mythology, the name Myrto may refer to one of the following characters:
- Myrto, one of the Maenads.
- Myrto, a possible eponym for the Myrtoan Sea.
- Myrto, an Amazon and one of the possible mothers of Myrtilus by Hermes.
- Myrto, daughter of Menoitios of Opus, sister to Patroclus. She had a daughter Eucleia by Heracles.