| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
| Osariz | city | Province of Isabela | Philippines | 16.8269444 | 121.525 | 337 | 33619 |
| Osboy | city | Province of Bulacan | Philippines | 14.8666667 | 121.1166667 | 626 | 105778 |
| Oscaris | city | Province of Isabela | Philippines | 16.8269444 | 121.525 | 337 | 33619 |
| Oscariz | city | Province of Isabela | Philippines | 16.8269444 | 121.525 | 337 | 33619 |
| Osemena | city | Province of Samar | Philippines | 11.1911111 | 125.1913889 | 137 | 3498 |
| Osiao | city | Province of Sorsogon | Philippines | 13.0897222 | 123.9777778 | 620 | 13017 |
| Osias | city | Province of North Cotabato | Philippines | 7.6 | 124.8166667 | 1017 | 15804 |
| Osiem | city | Province of Pangasinan | Philippines | 16.05 | 120.4166667 | 114 | 137318 |
| Osine | city | Province of Camarines Sur | Philippines | 13.6333333 | 123.4833333 | 255 | 53189 |
| Osio | city | Province of Lanao del Sur | Philippines | 7.5666667 | 124.1 | 164 | 22641 |
| Oslao | city | Province of Surigao del Norte | Philippines | 9.7458333 | 125.4 | 324 | 17101 |
| Oslob | city | Province of Cebu | Philippines | 9.5247222 | 123.4297222 | 3 | 17384 |
| Osmad | city | Province of Cebu | Philippines | 9.9066667 | 123.5586111 | 252 | 40631 |
| Osman | city | Province of Aklan | Philippines | 11.6602778 | 122.1733333 | 980 | 26686 |
| Osmena | city | Province of Palawan | Philippines | 10.5208333 | 119.9258333 | 3 | 5037 |
| Osmena | city | Angeles City | Philippines | 13.7833333 | 122.0833333 | 0 | 14817 |
| Osmena | city | Province of Masbate | Philippines | 13.1333333 | 122.9833333 | 160 | 7629 |
| Osmena | city | Province of Masbate | Philippines | 12.7313889 | 123.3322222 | 311 | 5111 |
| Osmena | city | Province of Catanduanes | Philippines | 13.8530556 | 124.305 | 574 | 16758 |
| Osmena | city | Province of Leyte | Philippines | 11.4283333 | 124.5311111 | 3 | 13954 |
| Osmena | city | Province of Leyte | Philippines | 11.35 | 124.55 | 0 | 12083 |
| Osmena | city | Angeles City | Philippines | 12.0666667 | 124.5833333 | 0 | 12894 |
| Osmena | city | Angeles City | Philippines | 12.1497222 | 124.5938889 | 167 | 26615 |
| Osmena | city | Province of Leyte | Philippines | 10.3166667 | 124.8 | 36 | 35907 |
| Osmena | city | Province of Northern Samar | Philippines | 12.3833333 | 125.0333333 | 160 | 19290 |
| Osmena | city | Province of Samar | Philippines | 11.7166667 | 125.0666667 | 590 | 6945 |
| Osmena | city | Province of Leyte | Philippines | 10.6666667 | 125.1 | 351 | 16310 |
| Osmena | city | Province of Northern Samar | Philippines | 12.5166667 | 125.15 | 337 | 18911 |
| Osmena | city | Province of Samar | Philippines | 11.1911111 | 125.1913889 | 137 | 3498 |
| Osmena | city | Province of Surigao del Norte | Philippines | 10.1869444 | 125.5116667 | 147 | 5893 |
| Osmena | city | Province of Surigao del Norte | Philippines | 9.7802778 | 126.0775 | 62 | 18840 |
| Osmena Student | city | Province of Nueva Ecija | Philippines | 15.7666667 | 120.9 | 226 | 55140 |
| Osmenia | city | Province of Samar | Philippines | 11.1911111 | 125.1913889 | 137 | 3498 |
| Osmeña | city | Province of Palawan | Philippines | 10.5208333 | 119.9258333 | 3 | 5037 |
| Osmeña | city | Angeles City | Philippines | 13.7833333 | 122.0833333 | 0 | 14817 |
| Osmeña | city | Province of Masbate | Philippines | 13.1333333 | 122.9833333 | 160 | 7629 |
| Osmeña | city | Province of Masbate | Philippines | 12.7313889 | 123.3322222 | 311 | 5111 |
| Osmeña | city | Province of Catanduanes | Philippines | 13.8530556 | 124.305 | 574 | 16758 |
| Osmeña | city | Province of Leyte | Philippines | 11.4283333 | 124.5311111 | 3 | 13954 |
| Osmeña | city | Province of Leyte | Philippines | 11.35 | 124.55 | 0 | 12083 |
| Osmeña | city | Angeles City | Philippines | 12.0666667 | 124.5833333 | 0 | 12894 |
| Osmeña | city | Province of Leyte | Philippines | 10.3166667 | 124.8 | 36 | 35907 |
| Osmeña | city | Province of Northern Samar | Philippines | 12.3833333 | 125.0333333 | 160 | 19290 |
| Osmeña | city | Province of Samar | Philippines | 11.7166667 | 125.0666667 | 590 | 6945 |
| Osmeña | city | Province of Leyte | Philippines | 10.6666667 | 125.1 | 351 | 16310 |
| Osmeña | city | Province of Northern Samar | Philippines | 12.5166667 | 125.15 | 337 | 18911 |
| Osmeña | city | Province of Samar | Philippines | 11.1911111 | 125.1913889 | 137 | 3498 |
| Osmeña | city | Province of Surigao del Norte | Philippines | 10.1869444 | 125.5116667 | 147 | 5893 |
| Oso | city | Province of Ilocos Sur | Philippines | 16.95 | 120.55 | 1056 | 12633 |
| Osorio | city | Province of Antique | Philippines | 11.3827778 | 122.1169444 | 1309 | 26572 |
| Osorio | city | Province of Antique | Philippines | 10.85 | 122.1666667 | 2427 | 19114 |