| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| Ojo de Agua | city | Provincia de Alajuela | Costa Rica | 9.95 | -84.2 | 2746 | 120142 |
| Oricuajo | city | Provincia de Alajuela | Costa Rica | 9.95 | -84.6166667 | 495 | 11099 |
| Orotina | city | Provincia de Alajuela | Costa Rica | 9.9 | -84.5333333 | 528 | 7268 |
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