| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
| Ol-og | city | Province of Leyte | Philippines | 11.7769444 | 124.3061111 | 262 | 7284 |
| Olabe | city | Province of Siquijor | Philippines | 9.25 | 123.65 | 6 | 20334 |
| Olag Pequeno | city | Province of Camarines Sur | Philippines | 13.8166667 | 123.3666667 | 219 | 26468 |
| Olag Pequeño | city | Province of Camarines Sur | Philippines | 13.8166667 | 123.3666667 | 219 | 26468 |
| Olagbent | city | Province of Davao del Sur | Philippines | 6.3588889 | 125.2733333 | 324 | 16770 |
| Olamian | city | Province of North Cotabato | Philippines | 7.3077778 | 124.475 | 321 | 30397 |
| Olanen | city | Province of Pangasinan | Philippines | 16.25 | 119.7833333 | 328 | 19145 |
| Olang | city | Province of Siquijor | Philippines | 9.2 | 123.65 | 36 | 22070 |
| Olango | city | Province of Iloilo | Philippines | 10.7075 | 122.1808333 | 472 | 46710 |
| Olango | city | Province of Cebu | Philippines | 10.1894444 | 123.5452778 | 321 | 48593 |
| Olanin | city | Province of Pangasinan | Philippines | 16.25 | 119.7833333 | 328 | 19145 |
| Olas | city | Province of Camarines Sur | Philippines | 13.9219444 | 123.4352778 | 19 | 12419 |
| Olasi | city | Province of Palawan | Philippines | 12.044444 | 120.3119444 | 3 | 2814 |
| Olave | city | Province of Siquijor | Philippines | 9.25 | 123.65 | 6 | 20334 |
| Olay | city | Province of Negros Oriental | Philippines | 10.3597222 | 123.2975 | 164 | 27618 |
| Olayan | city | Province of Samar | Philippines | 11.5447222 | 124.9002778 | 114 | 14011 |
| Olaycon | city | Province of Davao del Norte | Philippines | 7.7877778 | 126.0261111 | 242 | 24405 |
| Olayon | city | Province of Davao del Norte | Philippines | 7.7877778 | 126.0261111 | 242 | 24405 |
| Olbuhan | city | Province of Bohol | Philippines | 9.6344444 | 124.34 | 0 | 16338 |
| Old Angadanan | city | Province of Nueva Vizcaya | Philippines | 16.5044444 | 121.2311111 | 823 | 67592 |
| Old Balugo | city | Province of Samar | Philippines | 11.9061111 | 124.8213889 | 167 | 23043 |
| Old Carmen | city | Province of Cebu | Philippines | 10.5930556 | 124.0177778 | 3 | 33963 |
| Old Centro | city | Province of La Union | Philippines | 16.85 | 120.4833333 | 1154 | 38282 |
| Old Clavijo | city | Province of Agusan del Sur | Philippines | 8.1833333 | 125.9833333 | 59 | 9444 |
| Old Cosina | city | Province of Bukidnon | Philippines | 8.15 | 124.7 | 3277 | 8053 |
| Old Escalante | city | Angeles City | Philippines | 10.8361111 | 123.5602778 | 3 | 21722 |
| Old Guinlo | city | Province of Palawan | Philippines | 10.7147222 | 119.4811111 | 157 | 4704 |
| Old Gumiad | city | Province of Quirino | Philippines | 16.1666667 | 121.4166667 | 3284 | 2758 |
| Old Kidapawan | city | Province of North Cotabato | Philippines | 7.0166667 | 125.1333333 | 1519 | 37001 |
| Old Mahayag | city | Province of Samar | Philippines | 11.8441667 | 124.8219444 | 160 | 24365 |
| Old Manunca | city | Province of Samar | Philippines | 11.4363889 | 125.0152778 | 167 | 17359 |
| Old Maritao | city | Province of Zamboanga del Sur | Philippines | 7.6555556 | 123.3416667 | 200 | 25533 |
| Old Mobo | city | Province of Masbate | Philippines | 12.3333333 | 123.6666667 | 72 | 17323 |
| Old Pandanon | city | | Philippines | 10.5666667 | 123.1666667 | 1233 | 31883 |
| Old Rizal | city | Province of Northern Samar | Philippines | 12.5113889 | 124.5936111 | 72 | 7777 |
| Old Rosario | city | Province of Batangas | Philippines | 13.8833333 | 121.2166667 | 587 | 87823 |
| Old Sagay | city | | Philippines | 10.9333333 | 123.4333333 | 42 | 25474 |
| Old Salaman | city | Province of Sultan Kudarat | Philippines | 6.61 | 124.0638889 | 55 | 18035 |
| Old San Agustin | city | Province of Samar | Philippines | 11.3336111 | 125.0972222 | 101 | 7445 |
| Old San Antonio | city | Province of Sorsogon | Philippines | 12.6958333 | 124.1308333 | 0 | 11536 |
| Old San Mariano | city | Province of Isabela | Philippines | 16.99 | 122.0433333 | 324 | 7189 |
| Old San Pablo | city | Province of Isabela | Philippines | 17.4488889 | 121.7963889 | 209 | 14938 |
| Old San Remigio | city | Province of Antique | Philippines | 10.85 | 122.1 | 531 | 15811 |
| Old Saniga | city | Province of Rizal | Philippines | 14.5813889 | 121.0269444 | 98 | 2522554 |
| Old Santa Cruz | city | Province of Samar | Philippines | 11.9061111 | 124.8213889 | 167 | 23043 |
| Old Santa Lucia | city | Province of Nueva Ecija | Philippines | 15.5 | 120.7833333 | 68 | 48278 |
| Old Santo Rosario | city | Province of Pampanga | Philippines | 15.45 | 120.7833333 | 65 | 47513 |
| Old Tarazona | city | Angeles City | Philippines | 9.8916667 | 122.8875 | 1269 | 28758 |
| Old Tolong | city | Province of Negros Oriental | Philippines | 9.3461111 | 122.8297222 | 26 | 9871 |
| Old Town | city | Province of Bohol | Philippines | 9.8305556 | 124.3269444 | 495 | 33075 |
| Old Town Sierra Bullones | city | Province of Bohol | Philippines | 9.7444444 | 124.3466667 | 1522 | 31432 |
| Old Verdu | city | Province of Agusan del Sur | Philippines | 8.6952778 | 125.7116667 | 72 | 11974 |
| Olea | city | Province of Pangasinan | Philippines | 15.8666667 | 120.5 | 98 | 75830 |
| Olera | city | Angeles City | Philippines | 12.0666667 | 124.5833333 | 0 | 12894 |
| Oleras | city | Province of Northern Samar | Philippines | 12.4488889 | 125.0344444 | 9 | 20901 |
| Olicasto | city | Province of Batangas | Philippines | 13.9 | 120.8833333 | 0 | 76737 |
| Olimbo | city | Province of Negros Oriental | Philippines | 9.4666667 | 122.7666667 | 688 | 19556 |
| Olimbo Hacienda | city | | Philippines | 10.2666667 | 122.9666667 | 59 | 50497 |
| Olimpia | city | Province of Rizal | Philippines | 14.5666667 | 121.0333333 | 98 | 2522554 |
| Olimpia | city | Province of Negros Oriental | Philippines | 9.6183333 | 123.1455556 | 0 | 11458 |
| Olingan | city | Province of Abra | Philippines | 17.4833333 | 120.6333333 | 849 | 17690 |
| Olingan | city | Province of Zamboanga del Norte | Philippines | 8.5313889 | 123.3194444 | 16 | 31260 |
| Olioeg | city | Province of Nueva Vizcaya | Philippines | 16.4 | 120.95 | 4022 | 6636 |
| Olisijan | city | Province of Southern Leyte | Philippines | 10.3833333 | 124.9833333 | 0 | 29209 |
| Olituo | city | Province of Pangasinan | Philippines | 15.8166667 | 120.4833333 | 42 | 69554 |
| Olivo | city | Province of Cebu | Philippines | 10.8641667 | 123.8805556 | 88 | 14014 |
| Olla | city | Province of Laguna | Philippines | 14.1586111 | 121.4561111 | 662 | 86742 |
| 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 |
| Olmo | city | | Philippines | 10.2166667 | 122.9333333 | 32 | 56922 |
| Olo | city | Province of Pangasinan | Philippines | 15.7666667 | 120.3166667 | 111 | 47404 |
| Olo | city | Province of Siquijor | Philippines | 9.2166667 | 123.5166667 | 301 | 15639 |
| Olo-Baroc | city | Province of Iloilo | Philippines | 10.6833333 | 122.3666667 | 6 | 55419 |
| Olo-Olo Norte | city | Province of Ilocos Sur | Philippines | 17.28 | 120.4502778 | 114 | 31043 |
| Olo-olo | city | Province of Ilocos Sur | Philippines | 17.28 | 120.4502778 | 114 | 31043 |
| Oloc | city | Province of Antique | Philippines | 11.1275 | 122.0411111 | 111 | 5058 |
| Olong-tao | city | Angeles City | Philippines | 13.7369444 | 122.1783333 | 160 | 21906 |
| Olongapo | city | Angeles City | Philippines | 14.8291667 | 120.2827778 | 124 | 37548 |
| Olongapo City | city | Angeles City | Philippines | 14.8291667 | 120.2827778 | 124 | 37548 |
| Olongo | city | Province of Iloilo | Philippines | 10.7075 | 122.1808333 | 472 | 46710 |
| Olongtauo Ibaba | city | Angeles City | Philippines | 13.7369444 | 122.1783333 | 160 | 21906 |
| Olongtauo Ilaya | city | Angeles City | Philippines | 13.7666667 | 122.2166667 | 177 | 26524 |
| Olontano | city | Angeles City | Philippines | 13.7166667 | 122.15 | 3 | 16254 |
| Oloolo | city | Province of Batangas | Philippines | 13.6375 | 121.2297222 | 91 | 18258 |
| Olorga | city | Province of Palawan | Philippines | 8.2175 | 117.1183333 | 0 | 1030 |
| Olotayan | city | Province of Capiz | Philippines | 11.6333333 | 122.8333333 | 0 | 14891 |
| Oloybuaya | city | Province of Tarlac | Philippines | 15.6 | 120.6 | 78 | 83935 |
| Oluangan | city | Province of Iloilo | Philippines | 10.8272222 | 122.3697222 | 419 | 36955 |
| Oluañgan | city | Province of Iloilo | Philippines | 10.8272222 | 122.3697222 | 419 | 36955 |
| Olutanga | city | Province of Zamboanga del Sur | Philippines | 7.3105556 | 122.8463889 | 0 | 20336 |
| Olutanga | city | Province of Zamboanga del Sur | Philippines | 7.4333333 | 122.9 | 127 | 14194 |
| Olyaoyao | city | Province of Albay | Philippines | 13.0969444 | 123.4658333 | 367 | 50166 |