UpAlphabetical listing of Places in Puerto Rico
| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|
| Oasis Gardens | city | Puerto Rico | United States | 18.38 | -66.10 | 187 | |
| Obrero | city | Puerto Rico | United States | 18.47 | -66.74 | 36 | |
| Obrero | city | Puerto Rico | United States | 18.43 | -66.05 | 6 | |
| Ocean Park | city | Puerto Rico | United States | 18.45 | -66.05 | 16 | |
| Oceanview | city | Puerto Rico | United States | 18.47 | -66.74 | 13 | |
| Ojo de Agua | city | Puerto Rico | United States | 18.45 | -66.40 | 65 | |
| Olazabal | city | Puerto Rico | United States | 18.39 | -66.15 | 42 | |
| Olimpo | city | Puerto Rico | United States | 18.00 | -66.11 | 285 | |
| Olimpo Comunidad | city | Puerto Rico | United States | 18.00 | -66.11 | 285 | |
| Olivares | city | Puerto Rico | United States | 18.00 | -67.07 | 173 | |
| Oliver | city | Puerto Rico | United States | 18.39 | -66.19 | 104 | |
| Ollas Hondas | city | Puerto Rico | United States | 18.05 | -66.53 | 124 | |
| Oriente | city | Puerto Rico | United States | 18.44 | -66.71 | 19 | |
| Oriente (historical) | city | Puerto Rico | United States | 18.23 | -65.67 | 104 | |
| Orocovis | city | Puerto Rico | United States | 18.23 | -66.39 | 2017 | |
| Orocovis Zona Urbana | city | Puerto Rico | United States | 18.23 | -66.39 | 2017 | |
| Ortiga | city | Puerto Rico | United States | 18.17 | -66.45 | 1988 | |
| Ortíz | city | Puerto Rico | United States | 18.33 | -66.32 | 830 | |
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