| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
| Obong | city | Province of Pangasinan | Philippines | 15.85 | 120.4 | 118 | 106416 |
| Oboyoboy | city | Province of Pangasinan | Philippines | 16.2 | 119.8666667 | 141 | 43197 |
| Oda | city | Province of Pangasinan | Philippines | 16.1333333 | 119.85 | 328 | 39170 |
| Ointambo | city | Province of Pangasinan | Philippines | 16.0833333 | 120.4166667 | 101 | 137318 |
| Olanen | city | Province of Pangasinan | Philippines | 16.25 | 119.7833333 | 328 | 19145 |
| Olanin | city | Province of Pangasinan | Philippines | 16.25 | 119.7833333 | 328 | 19145 |
| Olea | city | Province of Pangasinan | Philippines | 15.8666667 | 120.5 | 98 | 75830 |
| Olituo | city | Province of Pangasinan | Philippines | 15.8166667 | 120.4833333 | 42 | 69554 |
| Ollao | city | Province of Pangasinan | Philippines | 16.05 | 119.8 | 154 | 25094 |
| Ollio-ilio | city | Province of Pangasinan | Philippines | 15.9622222 | 119.7661111 | 49 | 12533 |
| Olo | city | Province of Pangasinan | Philippines | 15.7666667 | 120.3166667 | 111 | 47404 |
| Omando | city | Province of Pangasinan | Philippines | 15.8833333 | 120.45 | 118 | 107071 |
| Ontambo | city | Province of Pangasinan | Philippines | 16.0833333 | 120.4166667 | 101 | 137318 |
| Osiem | city | Province of Pangasinan | Philippines | 16.05 | 120.4166667 | 114 | 137318 |
| Ouou | city | Province of Pangasinan | Philippines | 15.7561111 | 120.4469444 | 26 | 65245 |
| Oyong | city | Province of Pangasinan | Philippines | 16.05 | 120.1333333 | 0 | 17536 |
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