| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Oppicherla | city | Andhra Pradesh | India | 16.44 | 79.70 | 387 | 23643 |
| Oppido Lucano | city | Basilicata | Italy | 40.78 | 16.00 | 1669 | 4835 |
| Oppido Mamertina | city | Calabria | Italy | 38.29 | 15.98 | 997 | 10240 |
| Oppidum Mercurium | city | Harghita | Romania | 46.35 | 25.80 | 2509 | 33465 |
| Oppidum Sancti Pauli | city | Provence-Alpes-Cote d'Azur | France | 43.70 | 7.12 | 400 | 83068 |
| Oppidum Sancti Trudonis | city | Vlaanderen | Belgium | 50.82 | 5.19 | 196 | 27432 |
| Oppidum Ubiorum | city | Nordrhein-Westfalen | Germany | 50.93 | 6.95 | 150 | 194141 |
| Oppidum Viae | city | British Virgin Islands | 18.42 | -64.62 | 0 | 12257 | |
| Oppin | city | Sachsen-Anhalt | Germany | 51.55 | 12.03 | 344 | 31632 |
| Oppin | city | Sachsen-Anhalt | Germany | 51.72 | 12.62 | 830 | 3427 |
| Opping | city | Oberosterreich | Austria | 48.60 | 13.93 | 1906 | 6062 |
| Opping | city | Bayern | Germany | 48.35 | 13.02 | 1669 | 4500 |
| Oppinge | city | Halland | Sweden | 56.68 | 13.02 | 226 | 6012 |
| Oppingen | city | Baden-Wurttemberg | Germany | 48.54 | 9.83 | 2509 | 6019 |
| Oppingen-Au Airfield | airport | 48.56 | 9.82 | 2238 | 0 | ||
| Oppitz | city | Sachsen | Germany | 51.30 | 14.42 | 830 | 2563 |
| Oppitz - Psowje | city | Sachsen | Germany | 51.30 | 14.42 | 830 | 2563 |
| Oppitzsch | city | Sachsen | Germany | 51.34 | 13.27 | 311 | 19159 |