Socrates, who is the narrator.
Glaucon.
Thrasymachus.
Polemarchus.
Cleitophon.
Cephalus.
And others who are mute auditors.
Adeimantus.
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.