| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
| Oba | city | Province of Agusan del Norte | Philippines | 8.9947222 | 125.2747222 | 98 | 20769 |
| Obajan | city | Province of Bohol | Philippines | 9.85 | 123.8 | 3 | 22553 |
| Obaliw | city | Province of Albay | Philippines | 13.2333333 | 123.5 | 154 | 46300 |
| Oban | city | Province of Bohol | Philippines | 9.8166667 | 124.1333333 | 820 | 21269 |
| Obando | city | Province of Bulacan | Philippines | 14.7069444 | 120.93 | 13 | 1781761 |
| Obayan | city | Province of Samar | Philippines | 11.6030556 | 125.083333 | 334 | 9273 |
| Obfal | city | Mountain Province | Philippines | 17.1566667 | 121.3480556 | 1804 | 4717 |
| Obo | city | Province of Masbate | Philippines | 11.9555556 | 123.1658333 | 167 | 4610 |
| Obo | city | Province of Cebu | Philippines | 9.8008333 | 123.4805556 | 1312 | 52637 |
| Obo | city | Province of Catanduanes | Philippines | 13.7166667 | 124.25 | 643 | 14333 |
| Obo | city | Province of Catanduanes | Philippines | 13.65 | 124.2833333 | 987 | 26931 |
| Obo | city | Province of Samar | Philippines | 11.6419444 | 124.7591667 | 334 | 17479 |
| Obo-ob | city | Angeles City | Philippines | 12.2172222 | 124.5991667 | 282 | 19983 |
| Obobug | city | Province of La Union | Philippines | 16.7 | 120.4833333 | 902 | 18429 |
| Obod | city | Province of Ilocos Sur | Philippines | 16.8833333 | 120.6166667 | 2624 | 5696 |
| Obojan | city | Province of Bohol | Philippines | 9.85 | 123.8 | 3 | 22553 |
| Obojan | city | Province of Bohol | Philippines | 9.8880556 | 124.0922222 | 866 | 25804 |
| Obol | city | Province of Tawi-Tawi | Philippines | 4.9247222 | 119.7994444 | 0 | 0 |
| Obong | city | Province of Pangasinan | Philippines | 15.85 | 120.4 | 118 | 106416 |
| Obong | city | Province of Cebu | Philippines | 9.7413889 | 123.5119444 | 3 | 23622 |
| Obongobong | city | Province of Southern Leyte | Philippines | 10.3802778 | 125.1791667 | 72 | 14971 |
| Oboob | city | Mountain Province | Philippines | 17.0666667 | 121.2333333 | 2296 | 4213 |
| Oboob | city | Angeles City | Philippines | 13.85 | 122.25 | 324 | 27288 |
| Oboob | city | Province of Cebu | Philippines | 11.1563889 | 123.7483333 | 16 | 40628 |
| Oboyoboy | city | Province of Pangasinan | Philippines | 16.2 | 119.8666667 | 141 | 43197 |
| Obrero | city | Angeles City | Philippines | 14.6333333 | 120.9833333 | 26 | 2210262 |
| Obrero | city | Angeles City | Philippines | 12.0783333 | 124.5919444 | 39 | 15450 |
| Obrero | city | Province of Samar | Philippines | 11.9838889 | 124.8466667 | 164 | 13052 |
| Obrero | city | Angeles City | Philippines | 7.0833333 | 125.6 | 16 | 32978 |
| Obrevo | city | Angeles City | Philippines | 12.0783333 | 124.5919444 | 39 | 15450 |
| Obual | city | Province of Kalinga-Apayao | Philippines | 17.5186111 | 121.2094444 | 1968 | 3570 |
| Obuat | city | Province of Kalinga-Apayao | Philippines | 17.5186111 | 121.2094444 | 1968 | 3570 |
| Obug | city | Province of La Union | Philippines | 16.7 | 120.4833333 | 902 | 18429 |
| Obuhan | city | Province of Bohol | Philippines | 9.8172222 | 123.8883333 | 656 | 33408 |
| Obuhan | city | Province of Bohol | Philippines | 9.95 | 123.9666667 | 141 | 42887 |
| Obuhan | city | Province of Bohol | Philippines | 9.9797222 | 124.0475 | 121 | 38449 |
| Obuhan | city | Province of Bohol | Philippines | 9.8880556 | 124.0922222 | 866 | 25804 |
| Obujan | city | Province of Bohol | Philippines | 9.6166667 | 123.9666667 | 49 | 18585 |
| Obuyon | city | Angeles City | Philippines | 13.6 | 122.5333333 | 173 | 14780 |
| Obó | city | Province of Cebu | Philippines | 9.8008333 | 123.4805556 | 1312 | 52637 |
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