| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Oraiokastro | city | Kentriki Makedonia | Greece | 40.73 | 22.92 | 830 | 71159 |
| Oraiokastro | city | Ipeiros | Greece | 39.99 | 20.55 | 1906 | 1478 |
| Oraiókastron | city | Kentriki Makedonia | Greece | 40.73 | 22.92 | 830 | 71159 |
| Oraiókastron | city | Ipeiros | Greece | 39.99 | 20.55 | 1906 | 1478 |
| Oraía | city | Dytiki Ellada | Greece | 37.86 | 21.49 | 830 | 3728 |
| Oraío | city | Anatoliki Makedonia kai Thraki | Greece | 41.27 | 24.83 | 1945 | 1130 |
| Oraíon | city | Anatoliki Makedonia kai Thraki | Greece | 41.27 | 24.83 | 1945 | 1130 |
| Orchomenos | city | Sterea Ellada | Greece | 38.49 | 22.98 | 328 | 8029 |
| Orchomenus | city | Sterea Ellada | Greece | 38.49 | 22.98 | 328 | 8029 |
| Orchomenós | city | Peloponnisos | Greece | 37.72 | 22.32 | 2509 | 1833 |
| Orchomène | city | Sterea Ellada | Greece | 38.49 | 22.98 | 328 | 8029 |
| Orcómeno | city | Sterea Ellada | Greece | 38.49 | 22.98 | 328 | 8029 |
| Oreini | city | Kentriki Makedonia | Greece | 41.20 | 23.59 | 2083 | 9530 |
| Oreini | city | Thessalia | Greece | 39.44 | 21.34 | 3349 | 227 |
| Oreini Meligou | city | Peloponnisos | Greece | 37.36 | 22.66 | 2772 | 1192 |
| Oreino | city | Kriti | Greece | 35.08 | 25.91 | 2509 | 2383 |
| Oreino Korakovouni | city | Peloponnisos | Greece | 37.30 | 22.76 | 1669 | 2229 |
| Oreinon | city | Kriti | Greece | 35.08 | 25.91 | 2509 | 2383 |
| Oreiní | city | Dytiki Ellada | Greece | 37.87 | 21.85 | 3349 | 1233 |
| Oreinó | city | Ipeiros | Greece | 39.97 | 20.34 | 2050 | 345 |
| Oreinón | city | Ipeiros | Greece | 39.97 | 20.34 | 2050 | 345 |
| Oreinón Korakovoúnion | city | Peloponnisos | Greece | 37.30 | 22.76 | 1669 | 2229 |
| Oreokastro | city | Kentriki Makedonia | Greece | 40.73 | 22.92 | 830 | 71159 |
| Oreokastro | city | Ipeiros | Greece | 39.99 | 20.55 | 1906 | 1478 |
| Oreorastron | city | Kentriki Makedonia | Greece | 40.73 | 22.92 | 830 | 71159 |
| Oreovitsa | city | Kentriki Makedonia | Greece | 41.04 | 22.58 | 830 | 3323 |
| Oreoí | city | Sterea Ellada | Greece | 38.95 | 23.09 | 124 | 4842 |
| Oreskeia | city | Kentriki Makedonia | Greece | 40.86 | 23.64 | 370 | 1516 |
| Oreskia | city | Kentriki Makedonia | Greece | 40.86 | 23.64 | 370 | 1516 |
| Orestiada | city | Anatoliki Makedonia kai Thraki | Greece | 41.51 | 26.53 | 72 | 11967 |
| Orestias | city | Anatoliki Makedonia kai Thraki | Greece | 41.51 | 26.53 | 72 | 11967 |
| Orestini | city | Anatoliki Makedonia kai Thraki | Greece | 41.23 | 24.82 | 1991 | 449 |
| Orevitsa | city | Kentriki Makedonia | Greece | 41.04 | 22.58 | 830 | 3323 |
| Orfani | city | Anatoliki Makedonia kai Thraki | Greece | 40.78 | 23.95 | 232 | 1720 |
| Orfanon | city | Anatoliki Makedonia kai Thraki | Greece | 40.98 | 24.79 | 42 | 4400 |
| Orfaná | city | Thessalia | Greece | 39.40 | 22.22 | 396 | 1939 |
| Orfanó | city | Anatoliki Makedonia kai Thraki | Greece | 40.98 | 24.79 | 42 | 4400 |
| Orfánio | city | Anatoliki Makedonia kai Thraki | Greece | 40.78 | 23.95 | 232 | 1720 |
| Orfánion | city | Anatoliki Makedonia kai Thraki | Greece | 40.78 | 23.95 | 232 | 1720 |
| Organi | city | Anatoliki Makedonia kai Thraki | Greece | 41.25 | 25.68 | 1922 | 1308 |
| Organjilar | city | Anatoliki Makedonia kai Thraki | Greece | 40.93 | 24.71 | 39 | 6154 |
| Organjion | city | Anatoliki Makedonia kai Thraki | Greece | 41.10 | 24.29 | 830 | 7314 |
| Organjí | city | Anatoliki Makedonia kai Thraki | Greece | 41.10 | 24.29 | 830 | 7314 |
| Organtzi | city | Anatoliki Makedonia kai Thraki | Greece | 41.10 | 24.29 | 830 | 7314 |
| Orgias | city | Notio Aigaio | Greece | 37.67 | 24.35 | 154 | 777 |
| Orini Meligou | city | Peloponnisos | Greece | 37.36 | 22.66 | 2772 | 1192 |
| Orinon | city | Ipeiros | Greece | 39.97 | 20.34 | 2050 | 345 |
| Orinon | city | Notio Aigaio | Greece | 37.80 | 24.90 | 2076 | 3805 |
| Orinon Korakovounion | city | Peloponnisos | Greece | 37.30 | 22.76 | 1669 | 2229 |
| Oriní | city | Kentriki Makedonia | Greece | 41.20 | 23.59 | 2083 | 9530 |
| Oriní | city | Dytiki Ellada | Greece | 37.87 | 21.85 | 3349 | 1233 |
| Orinón | city | Kriti | Greece | 35.08 | 25.91 | 2509 | 2383 |
| Orio | city | Sterea Ellada | Greece | 38.53 | 24.12 | 150 | 3463 |
| Orion | city | Sterea Ellada | Greece | 38.53 | 24.12 | 150 | 3463 |
| Orizárion | city | Kentriki Makedonia | Greece | 40.78 | 22.09 | 167 | 18473 |
| Oriá | city | Peloponnisos | Greece | 37.36 | 22.55 | 2509 | 1945 |
| Orkhomenos | city | Sterea Ellada | Greece | 38.49 | 22.98 | 328 | 8029 |
| Orman Chifliki | city | Thessalia | Greece | 39.69 | 22.42 | 246 | 47185 |
| Ormanlí | city | Kentriki Makedonia | Greece | 41.16 | 23.27 | 131 | 8185 |
| Ormos | city | Kentriki Makedonia | Greece | 40.41 | 22.90 | 0 | 5476 |
| Ormos | city | Notio Aigaio | Greece | 37.77 | 24.95 | 3 | 2350 |
| Ormos Aiyialis | city | Notio Aigaio | Greece | 36.90 | 25.98 | 1669 | 538 |
| Ormos Korthiou | city | Notio Aigaio | Greece | 37.77 | 24.95 | 3 | 2350 |
| Ormos Methonis | city | Kentriki Makedonia | Greece | 40.46 | 22.59 | 0 | 5576 |
| Ormáno | city | Voreio Aigaio | Greece | 39.90 | 25.28 | 65 | 2692 |
| Orménio | city | Anatoliki Makedonia kai Thraki | Greece | 41.72 | 26.22 | 134 | 2266 |
| Orménion | city | Anatoliki Makedonia kai Thraki | Greece | 41.72 | 26.22 | 134 | 2266 |
| Ormília | city | Kentriki Makedonia | Greece | 40.29 | 23.54 | 55 | 3745 |
| Ormýlia | city | Kentriki Makedonia | Greece | 40.29 | 23.54 | 55 | 3745 |
| Orne | city | Kriti | Greece | 35.15 | 24.66 | 830 | 2179 |
| Orologio | city | Sterea Ellada | Greece | 38.53 | 24.09 | 318 | 3458 |
| Orologion | city | Sterea Ellada | Greece | 38.53 | 24.09 | 318 | 3458 |
| Oroloyion | city | Sterea Ellada | Greece | 38.53 | 24.09 | 318 | 3458 |
| Oropedhion | city | Anatoliki Makedonia kai Thraki | Greece | 41.34 | 24.25 | 2063 | 2536 |
| Oropedio | city | Anatoliki Makedonia kai Thraki | Greece | 41.34 | 24.25 | 2063 | 2536 |
| Oropedion | city | Anatoliki Makedonia kai Thraki | Greece | 41.34 | 24.25 | 2063 | 2536 |
| Oropos | city | Ipeiros | Greece | 39.16 | 20.72 | 259 | 3852 |
| Oropus | city | Attiki | Greece | 38.30 | 23.75 | 341 | 10467 |
| Oropédhion | city | Dytiki Makedonia | Greece | 40.12 | 21.31 | 2509 | 1223 |
| Oropédio | city | Dytiki Makedonia | Greece | 40.12 | 21.31 | 2509 | 1223 |
| Oropédion | city | Dytiki Makedonia | Greece | 40.12 | 21.31 | 2509 | 1223 |
| Oropós | city | Attiki | Greece | 38.30 | 23.75 | 341 | 10467 |
| Orová | city | Peloponnisos | Greece | 36.94 | 22.21 | 997 | 2936 |
| Orovás | city | Peloponnisos | Greece | 36.94 | 22.21 | 997 | 2936 |
| Orta-Koi | city | Dytiki Makedonia | Greece | 40.20 | 22.02 | 1991 | 5850 |
| Ortholithi | city | Dytiki Ellada | Greece | 38.05 | 22.01 | 2565 | 1043 |
| Ortholíthion | city | Dytiki Ellada | Greece | 38.05 | 22.01 | 2565 | 1043 |
| Ortholíthion | city | Attiki | Greece | 37.57 | 23.24 | 1669 | 1481 |
| Orthoniaí | city | Ionia Nisia | Greece | 37.85 | 20.69 | 1669 | 2290 |
| Orthonies - stara wioska | city | Ionia Nisia | Greece | 37.85 | 20.69 | 1669 | 2290 |
| Orthoniés | city | Ionia Nisia | Greece | 37.85 | 20.69 | 1669 | 2290 |
| Orthouni | city | Kriti | Greece | 35.40 | 23.90 | 1761 | 2099 |
| Orthounion | city | Kriti | Greece | 35.40 | 23.90 | 1761 | 2099 |
| Orthovouni | city | Thessalia | Greece | 39.76 | 21.47 | 1879 | 1213 |
| Orthovoúnion | city | Thessalia | Greece | 39.76 | 21.47 | 1879 | 1213 |
| Orthés | city | Kriti | Greece | 35.34 | 24.70 | 1669 | 3814 |
| Orva | city | Peloponnisos | Greece | 36.94 | 22.21 | 997 | 2936 |
| Orésteio | city | Peloponnisos | Greece | 37.42 | 22.12 | 1246 | 3869 |
| Orésteion | city | Peloponnisos | Greece | 37.42 | 22.12 | 1246 | 3869 |
| Oréstia | city | Kentriki Makedonia | Greece | 40.86 | 23.64 | 370 | 1516 |
| Oréstion | city | Peloponnisos | Greece | 37.42 | 22.12 | 1246 | 3869 |
| Orízartsi | city | Kentriki Makedonia | Greece | 40.93 | 22.57 | 39 | 4561 |