| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Opapo | city | Corse | France | 42.02 | 8.83 | 997 | 5276 |
| Opeda | city | Provence-Alpes-Cote d'Azur | France | 43.83 | 5.16 | 1207 | 7006 |
| Opio | city | Provence-Alpes-Cote d'Azur | France | 43.67 | 6.99 | 918 | 42264 |
| Opline | city | Nord-Pas-de-Calais | France | 50.69 | 2.92 | 55 | 51105 |
| Opoul | city | Languedoc-Roussillon | France | 42.87 | 2.87 | 830 | 1680 |
| Opoul-Périllos | city | Languedoc-Roussillon | France | 42.87 | 2.87 | 830 | 1680 |
| Oppede | city | Provence-Alpes-Cote d'Azur | France | 43.83 | 5.16 | 1207 | 7006 |
| Oppedette | city | Provence-Alpes-Cote d'Azur | France | 43.94 | 5.59 | 1912 | 983 |
| Oppenans | city | Franche-Comte | France | 47.59 | 6.38 | 1043 | 2391 |
| Opperral | city | Nord-Pas-de-Calais | France | 50.83 | 2.27 | 111 | 12092 |
| Oppervald | city | Nord-Pas-de-Calais | France | 50.83 | 2.27 | 111 | 12092 |
| Oppidum Sancti Pauli | city | Provence-Alpes-Cote d'Azur | France | 43.70 | 7.12 | 400 | 83068 |
| Oppy | city | Nord-Pas-de-Calais | France | 50.35 | 2.89 | 193 | 21005 |
| Oppède-les-Poulivets | city | Provence-Alpes-Cote d'Azur | France | 43.83 | 5.16 | 1207 | 7006 |
| Optevoz | city | Rhone-Alpes | France | 45.75 | 5.33 | 1030 | 3551 |
| Opéch | city | Lorraine | France | 49.46 | 6.37 | 925 | 7717 |