1. Oasis (38.08N, 22.33E) , Populated Place 2. Obar (40.84N, 22.3E) Pella, Populated Place 3. Obar Potamos (40.82N, 22.27E) Pella, Stream 4. Obar Rema (40.82N, 22.27E) Pella, Stream 5. Ocha (38.07N, 24.47E) , Mountain 6. Ochthia (39.03N, 21.44E) Evrytania, Populated Place 7. Octonia (38.52N, 24.17E) , Populated Place 8. Octonya-nisi (35.99N, 27.71E) Dodekanisos, Island 9. Odhiyitria (41.23N, 23E) Serrai, Populated Place 10. Odhiyitria Monastery (34.97N, 24.8E) , Monastery 11. Odigitria (41.23N, 23E) Serrai, Populated Place 12. Oeroi Potamos (38.2N, 23.1E) , Stream 13. Oeta (38.82N, 22.28E) , Mountain 14. Ofidusa (36.83N, 25.53E) Kyklades, Island 15. Ofiousa (37.61N, 25.11E) Kyklades, Island 16. Ofri (35.42N, 26.93E) Dodekanisos, Populated Place 17. Ofrinion (40.8N, 23.92E) , Populated Place 18. Oia (36.47N, 25.37E) Kyklades, Populated Place 19. Oiakion (41.08N, 24.95E) , Populated Place 20. Oichalia (39.61N, 21.98E) Trikala, Populated Place 21. Oikhalia (37.25N, 22E) , Populated Place 22. Oikismos Agiasmata (38.59N, 25.94E) Chios, Populated Place 23. Oikismos Agios Ioannis (38.21N, 26.07E) Chios, Populated Place 24. Oikismos Lilikas (38.21N, 26.06E) Chios, Populated Place 25. Oikismos Papagou (37.98N, 23.82E) , Section Of Populated Place 26. Oikismos Prosopikou D.E.I. (39.33N, 21.81E) Karditsa, Populated Place 27. Oikismos Prosopikou D.E.I. Dimosia Epicheirisi Ilektrismou (39.33N, 21.81E) Karditsa, Populated Place 28. Oikismos Prosopikou Dimosia Epicheirisi Ilektrismou (39.33N, 21.81E) Karditsa, Populated Place 29. Oikonomaiika (38.13N, 22.37E) , Populated Place 30. Oikonomianika (36.52N, 23.05E) , Populated Place 31. Oini (40.52N, 21.09E) Kastoria, Populated Place 32. Oini (37.38N, 23.07E) , Cape 33. Oinofita (38.32N, 23.63E) , Populated Place 34. Oinoi (40.52N, 21.09E) Kastoria, Populated Place 35. Oinoi (37.83N, 21.53E) , Populated Place 36. Oinoi (38.17N, 23.42E) , Populated Place 37. Oinoi (38.32N, 23.62E) , Populated Place 38. Oinoi (40.32N, 21.92E) , Populated Place 39. Oinoi (36.68N, 25.12E) Kyklades, Island 40. Oinois Potamos (38.12N, 24E) , Stream | 41. Oinokhorion (38.7N, 22.35E) , Populated Place 42. Oinous Potamos (37.1N, 22.43E) , Stream 43. Oinousa (38.51N, 26.22E) Chios, Populated Place 44. Oinousa (41.1N, 23.62E) , Populated Place 45. Oinousai (38.51N, 26.22E) Chios, Populated Place 46. Oinousai (38.52N, 26.23E) Chios, Island 47. Oinousai Islands (38.52N, 26.24E) Chios, Islands 48. Oinoussa (41.1N, 23.62E) , Populated Place 49. Oinoussai (38.51N, 26.22E) Chios, Populated Place 50. Oion (38.13N, 23.85E) , Populated Place 51. Oiti (38.73N, 22.4E) , Populated Place 52. Oiti Oros (38.82N, 22.28E) , Mountain 53. Oitilon (36.7N, 22.38E) , Populated Place 54. Okchilar (41.08N, 24.8E) , Populated Place 55. Okelemez (40.72N, 21.78E) , Populated Place 56. Okhi (38.05N, 24.47E) , Peak 57. Okhi Oros (38.07N, 24.47E) , Mountain 58. Okhia (36.48N, 22.38E) , Populated Place 59. Okhiron (41.3N, 23.85E) , Populated Place 60. Okhthia (37.65N, 21.9E) , Populated Place 61. Okhthia (38.65N, 21.28E) , Populated Place 62. Okhthonia (38.52N, 24.17E) , Populated Place 63. Okhtonia (38.53N, 24.23E) , Cape 64. Okhtos (37.12N, 22.75E) , Mountain 65. Oktonia (38.52N, 24.17E) , Populated Place 66. Okuz-Ova (40.33N, 22.01E) Kozani, Populated Place 67. Ola (41.17N, 24.38E) , Populated Place 68. Olajak (41.1N, 24.53E) , Populated Place 69. Old Corinth (37.92N, 22.88E) , Populated Place 70. Old Faliron (37.93N, 23.7E) , Populated Place 71. Olejik (40.9N, 24.2E) , Ruin(s) 72. Olejiki (40.6N, 23.48E) , Populated Place 73. Olena (37.75N, 21.55E) , Populated Place 74. Oleni (37.75N, 21.55E) , Populated Place 75. Olga (37.9N, 21.35E) , Populated Place 76. Oliaros (37N, 25.05E) Kyklades, Island 77. Olimbia (37.65N, 21.63E) , Populated Place 78. Olimbia Arkhaia (37.65N, 21.63E) , Populated Place 79. Olimbiai (36.52N, 22.47E) , Populated Place 80. Olimbias (39.98N, 22.25E) , Populated Place |