UpAlphabetical listing of Places in Samar
| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
| Obayan | city | Samar | Philippines | 11.60 | 125.01 | 314 | 8654 |
| Obo | city | Samar | Philippines | 11.64 | 124.76 | 334 | 15574 |
| Obo-ob | city | Samar | Philippines | 12.21 | 124.60 | 282 | 17504 |
| Obrero | city | Samar | Philippines | 11.98 | 124.85 | 164 | 7804 |
| Obrero | city | Samar | Philippines | 12.07 | 124.59 | 3 | 36915 |
| Obrevo | city | Samar | Philippines | 12.07 | 124.59 | 3 | 36915 |
| Occidental | city | Samar | Philippines | 12.15 | 124.60 | 104 | 22223 |
| Odoc | city | Samar | Philippines | 11.14 | 125.21 | 331 | 3504 |
| Odoc | city | Samar | Philippines | 11.25 | 125.17 | 98 | 4179 |
| Oeste | city | Samar | Philippines | 11.91 | 124.64 | 3 | 1266 |
| Oeste - A | city | Samar | Philippines | 11.91 | 124.64 | 3 | 1266 |
| Oeste San Vicente | city | Samar | Philippines | 11.91 | 124.64 | 3 | 1266 |
| Oguendo | city | Samar | Philippines | 12.13 | 124.54 | 42 | 22735 |
| Olayan | city | Samar | Philippines | 11.55 | 124.90 | 101 | 14373 |
| Old Balugo | city | Samar | Philippines | 11.91 | 124.82 | 167 | 19927 |
| Old Mahayag | city | Samar | Philippines | 11.84 | 124.82 | 160 | 26613 |
| Old Manunca | city | Samar | Philippines | 11.44 | 125.02 | 167 | 15419 |
| Old San Agustin | city | Samar | Philippines | 11.33 | 125.10 | 101 | 6520 |
| Old Santa Cruz | city | Samar | Philippines | 11.91 | 124.82 | 167 | 19927 |
| Olera | city | Samar | Philippines | 12.19 | 124.74 | 331 | 20768 |
| Olera | city | Samar | Philippines | 12.07 | 124.58 | 0 | 36529 |
| Opung | city | Samar | Philippines | 11.96 | 124.70 | 3 | 5884 |
| Oquendo | city | Samar | Philippines | 12.13 | 124.54 | 42 | 22735 |
| Oquendo Viejo | city | Samar | Philippines | 12.25 | 124.60 | 984 | 13419 |
| Osemena | city | Samar | Philippines | 11.19 | 125.19 | 137 | 3501 |
| Osmena | city | Samar | Philippines | 11.19 | 125.19 | 137 | 3501 |
| Osmena | city | Samar | Philippines | 12.18 | 124.65 | 239 | 19673 |
| Osmena | city | Samar | Philippines | 12.07 | 124.58 | 0 | 36529 |
| Osmenia | city | Samar | Philippines | 11.19 | 125.19 | 137 | 3501 |
| Osmeña | city | Samar | Philippines | 12.15 | 124.59 | 167 | 24924 |
| Osmeña | city | Samar | Philippines | 11.72 | 125.07 | 830 | 6064 |
| Otoc | city | Samar | Philippines | 11.60 | 125.03 | 314 | 8704 |
| Oyandic | city | Samar | Philippines | 11.78 | 124.98 | 0 | 13096 |
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