Places starting with: 'O'

1. Aegina (aka: Oenone, Oinone) An Island
2. Aisyme (aka: Oisyme) A City
3. Oaxus A town on the island of Crete.
4. Ocalea
5. Odeon of Athens
6. Okeanos (aka: Oceanus)
7. Oechalia
8. Oeneadae
9. Oenoe
10. Oetylus
11. Ogygia
12. Ogygian Gate One of the seven gates of Thebes.
13. Olenus (aka: Olene)
14. Olbia
15. Settlement of the Borystheneïtae (aka: Miletopolis, Olbiopolis, Olbia) A settlement of the Borystheneïtae. Not the same as the Olbia in Sardinia.
16. Olenian Rock
17. Olizon
18. Oloosson
19. Olynthus
20. Olympia
21. Ombrici The tribeland of the Ombrici.
22. Onceium Located along the river Ladon, inhabited by a temple of Demeter.
23. Oncaidian Gate One of the seven gates of Thebes.
24. Onchestus (aka: Onchestos)
25. Opoeis
26. Opus (aka: Opous)
27. Orchomenus (aka: Orkhomenos)
28. Ordessus (aka: Ordessos) Location uncertain. Tributary of the Danube. Flows with the Ararus between the Tiarantus and the Napari.
29. Oresteum
30. Ormenium (aka: Ormenios)
31. Orneae
32. Oropus
33. Orthe
34. Ossa