Socrates, who is the narrator.
Glaucon.
Adeimantus.
Polemarchus.
Cephalus.
Thrasymachus.
Cleitophon.
And others who are mute auditors.
The scene is laid in the house of Cephalus at the Piraeus; and the whole dialogue is narrated by Socrates the day after it actually took place to Timaeus, Hermocrates, Critias, and a nameless person, who are introduced in the Timaeus.