| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Ochomogo | city | Cartago | Costa Rica | 9.90 | -83.94 | 5193 | 131085 |
| Ojo de Agua | city | Cartago | Costa Rica | 9.62 | -83.81 | 9599 | 4341 |
| Oratorio | city | Cartago | Costa Rica | 9.90 | -83.83 | 5869 | 48824 |
| Oriente | city | Cartago | Costa Rica | 9.83 | -83.69 | 2509 | 9420 |
| Orosi | city | Cartago | Costa Rica | 9.80 | -83.85 | 3625 | 41321 |