B
| Ancient name | Location | Modern name | Also known as |
| Baris | south western Turkey | Isparta | |
| Bhrytos | Lebanon | Beirut | |
| Borysthenes | Ukrainian Black Sea coast | Berezan Island | Berezan' |
| Bouthroton (Βουθρωτόν) | southern Albania | abandoned | Butrint, Bouthrotios (Βουθρώτιος), Buthrotum |
| Brauron | Attica, Greece | abandoned | Vravrona, Vravronas |
| Byblos | Lebanon | Byblos | Byblos, Gubla, Gebal, Jbeil |
| Byllis | near Vlorë, Albania | abandoned | |
| Byzantium | Bosphorus Strait, western Turkey | Istanbul | Constantinople, Byzantion |
| Bythinion | western Turkey | Bolu | Vithinion (Βιθύνιον), Bithynium, Claudiopolis |
Read more about this topic: List Of Ancient Greek Cities