| Name | Speaker | Mentioned |
|---|
| Adeimantus of Collytus, son of Ariston | Parmenides , Republic | Apology |
| Agathon of Athens, son of Tisamenus | Symposium | Protagoras ; Epigram 6 |
| Alcibiades of Scambonidae, son of Clinias | Alcibiades , II Alcibiades , Protagoras , Symposium | Euthydemus , Gorgias |
| Antiphon of Athens, son of Pyrilampes | Parmenides | |
| Anytus of Euonymon, son of Anthemion | Meno | Apology |
| Apollodorus of Phalerum | Symposium | Apology , Phaedo |
| Aristides of Alopece, son of Lysimachus | Laches , Theages | Theaetetus |
| Aristodemus of Cydathenaeum | Symposium | |
| Aristophanes of Cydathenaeum, son of Philippus | Symposium | Apology ; Epigram 18 |
| Aristotle of Thorae, son of Timocrates | Parmenides | |
| Aspasia of Miletus, daughter of Axiochus | Menexenus | |
| Axiochus of Scambonidae, son of Alcibiades | Axiochus | Euthydemus |
| Callias of Alopece, son of Hipponicus | Apology , Protagoras | Axiochus , Cratylus , Eryxias , Philebus , Protagoras , Theaetetus |
| Callicles of Acharnae | Gorgias | |
| Cebes of Thebes | Phaedo | Crito ; Epistle XIII |
| Cephalus of Clazomenae | Parmenides | |
| Cephalus of Syracuse, son of Lysanias | Republic | Phaedrus |
| Chaerephon of Sphettus | Charmides , Gorgias , Halcyon | Apology |
| Charmides of Athens, son of Glaucon | Charmides , Theages | Axiochus , Protagoras , Symposium |
| Clinias of Cnossos | Epinomis , Laws | |
| Clinias of Scambonidae, son of Axiochus [1] | Axiochus , Euthydemus | |
| Clitophon of Athens, son of Aristonymus | Clitophon , Republic | |
| Cratylus of Athens, son of Smicrion | Cratylus | |
| Critias of Athens, son of Callaeschrus [2] | Charmides , Protagoras | Eryxias |
| Critias of Athens, son of Leaides [2] | Critias , Timaeus | |
| Crito of Alopece | Crito , Euthydemus , Phaedo | Apology |
| Ctesippus of Paeania | Euthydemus , Lysis | Phaedo |
| Demodocus of Anagyrus | Theages | Apology , Demodocus |
| Dionysodorus of Chios and Thurii | Euthydemus | |
| Diotima of Mantinea | Symposium | |
| Echecrates of Phlius | Phaedo | |
| Erasistratus of Athens | Eryxias | |
| Eryxias of Steiria | Eryxias | |
| Eryximachus of Athens, son of Acumenus | Symposium | Phaedrus , Protagoras |
| Euclides of Megara | Theaetetus | Phaedo |
| Eudicus of Athens, son of Apemantus | (Lesser) Hippias | (Greater) Hippias |
| Euthydemus of Chios and Thurii | Euthydemus | Cratylus |
| Euthyphro of Prospalta | Euthyphro | Cratylus |
| Glaucon of Collytus, son of Ariston | Parmenides , Republic , Symposium [3] | |
| Gorgias of Leontini, son of Charmantides | Gorgias | Apology , (Greater) Hippias , Meno , Phaedrus , Philebus , Symposium , Theages |
| Hermocrates of Syracuse, son of Hermon | Critias , Timaeus | |
| Hermogenes of Alopece, son of Hipponicus | Cratylus | Phaedo |
| Hippias of Elis, son of Diopeithes | (Greater) Hippias , (Lesser) Hippias , Protagoras | Apology , Phaedrus , Protagoras |
| Hippocrates of Athens, son of Apollodorus | Protagoras | |
| Hippothales of Athens, son of Hieronymus | Lysis | |
| Ion of Ephesus | Ion | |
| Laches of Aexone, son of Melanopus | Laches | Symposium |
| Lysias of Thurii and Athens, son of Cephalus | Phaedrus | Clitophon , Phaedrus , Republic |
| Lysimachus of Alopece, son of Aristides | Laches | Meno , On Virtue , Theaetetus , Theages |
| Lysis of Aexone, son of Democrates | Lysis | |
| Megillus of Sparta | Laws | Epinomis |
| Melesias of Alopece, son of Thucydides | Laches | Meno , On Virtue , Theages |
| Meletus of Pithus, son of Meletus | Apology | Euthyphro , Theaetetus |
| Menexenus of Athens, son of Demophon | Lysis , Menexenus | Phaedo |
| Meno of Pharsalus, son of Alexidemus [4] | Meno | |
| Nicias of Cydantidae, son of Niceratus | Laches | Gorgias , Republic , Theages |
| Parmenides of Elea, son of Pyres | Parmenides | Sophist , Symposium , Theaetetus |
| Pausanias of Cerameis | Symposium | Protagoras |
| Phaedo of Elis | Phaedo | |
| Phaedrus of Myrrhinus, son of Pythocles | Phaedrus , Symposium | Protagoras ; Epigram 4 |
| Philebus | Philebus | |
| Polemarchus of Thurii, son of Cephalus | Republic | Phaedrus |
| Polus of Acragas | Gorgias | Phaedrus , Theages |
| Prodicus of Ceos | Eryxias , Protagoras | Apology , Axiochus , Charmides , Cratylus , Eryxias , Euthydemus , (Greater) Hippias , Laches , Phaedrus , Protagoras , Republic , Symposium , Theaetetus , Theages |
| Protagoras of Abdera | Protagoras , Theaetetus | Cratylus , Euthydemus , (Greater) Hippias , Laws , Phaedrus , Republic , Sophist , Theaetetus |
| Protarchus of Athens, son of Callias | Philebus | |
| Pythodorus of Athens, son of Isolochus | Parmenides | Alcibiades |
| Simmias of Thebes | Phaedo | Crito , Phaedrus ; Epistle XIII |
| Sisyphus of Pharsalus [5] | Sisyphus | |
| Socrates of Alopece, son of Sophroniscus | Dialogues of Plato | Epistles II, VII, XIII |
| Socrates of Athens | Statesman | Sophist , Theaetetus ; Epistle XI [6] |
| Terpsion of Megara | Theaetetus | Phaedo |
| Theaetetus of Sunium, son of Euphronius | Sophist , Theaetetus | Statesman |
| Theages of Anagyrus, son of Demodocus | Theages | Apology , Republic |
| Theodorus of Cyrene | Sophist , Statesman , Theaetetus | |
| Thrasymachus of Chalcedon | Republic | Clitophon , Phaedrus |
| Thucydides of Alopece, son of Melesias | Laches | Theages |
| Timaeus of Epizephyrian Locris | Critias , Timaeus | |
| Timarchus | Theages | |
| Xanthippe , wife of Socrates of Alopece | Phaedo | Halcyon ; Epigram 8 [7] |
| Zeno of Elea | Parmenides | Alcibiades , Sophist |