| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
| Oac | city | Province of Cebu | Philippines | 10.55 | 123.7 | 9 | 2970 |
| Obo | city | Province of Cebu | Philippines | 9.8008333 | 123.4805556 | 1312 | 52637 |
| Obong | city | Province of Cebu | Philippines | 9.7413889 | 123.5119444 | 3 | 23622 |
| Oboob | city | Province of Cebu | Philippines | 11.1563889 | 123.7483333 | 16 | 40628 |
| Obó | city | Province of Cebu | Philippines | 9.8008333 | 123.4805556 | 1312 | 52637 |
| Ocana | city | Province of Cebu | Philippines | 10.0638889 | 123.6247222 | 32 | 55155 |
| Ocaña | city | Province of Cebu | Philippines | 10.0638889 | 123.6247222 | 32 | 55155 |
| Ocoy | city | Province of Cebu | Philippines | 11.1744444 | 123.7977778 | 0 | 35701 |
| Odlot | city | Province of Cebu | Philippines | 11.02778 | 124.0419444 | 0 | 24818 |
| Okoy | city | Province of Cebu | Philippines | 11.1744444 | 123.7977778 | 0 | 35701 |
| Olango | city | Province of Cebu | Philippines | 10.1894444 | 123.5452778 | 321 | 48593 |
| Old Carmen | city | Province of Cebu | Philippines | 10.5930556 | 124.0177778 | 3 | 33963 |
| Olivo | city | Province of Cebu | Philippines | 10.8641667 | 123.8805556 | 88 | 14014 |
| Omapad | city | Province of Cebu | Philippines | 10.3333333 | 123.95 | 19 | 409371 |
| Ongca | city | Province of Cebu | Philippines | 10.0711111 | 123.5475 | 1686 | 56674 |
| Opao | city | Province of Cebu | Philippines | 10.2666667 | 123.5833333 | 42 | 17942 |
| Opao | city | Province of Cebu | Philippines | 10.2166667 | 123.6 | 859 | 44656 |
| Opao | city | Province of Cebu | Philippines | 10.3280556 | 123.9563889 | 6 | 409371 |
| Oro | city | Province of Cebu | Philippines | 10.2666667 | 123.7333333 | 751 | 95918 |
| Oslob | city | Province of Cebu | Philippines | 9.5247222 | 123.4297222 | 3 | 17384 |
| Osmad | city | Province of Cebu | Philippines | 9.9066667 | 123.5586111 | 252 | 40631 |
| Owak | city | Province of Cebu | Philippines | 10.55 | 123.7 | 9 | 2970 |
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