| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
| Isabang | city | Province of Laguna | Philippines | 14.15 | 121.5 | 1118 | 57514 |
| Isabang | city | Angeles City | Philippines | 13.9666667 | 121.5666667 | 311 | 98718 |
| Isabang | city | Angeles City | Philippines | 13.9569444 | 121.5708333 | 239 | 121508 |
| Isabel | city | Province of Basilan | Philippines | 6.7063889 | 121.9713889 | 137 | 36156 |
| Isabel | city | Province of Leyte | Philippines | 10.9266667 | 124.4352778 | 6 | 31341 |
| Isabel Hacienda | city | | Philippines | 10.3833333 | 123.0333333 | 551 | 53322 |
| Isabel Hacienda | city | | Philippines | 10.9 | 123.4166667 | 131 | 42173 |
| Isabela | city | Province of Basilan | Philippines | 6.7063889 | 121.9713889 | 137 | 36156 |
| Isabela | city | Angeles City | Philippines | 10.2044444 | 122.9894444 | 219 | 43670 |
| Isabela | city | Province of Cebu | Philippines | 10.25 | 123.7333333 | 531 | 84831 |
| Isabela Central | city | | Philippines | 10.2166667 | 123.0333333 | 95 | 40982 |
| Isabella | city | Angeles City | Philippines | 10.2044444 | 122.9894444 | 219 | 43670 |
| Isagani | city | Province of Southern Leyte | Philippines | 10.1333333 | 124.8666667 | 29 | 29546 |
| Isauan | city | Province of Iloilo | Philippines | 10.6833333 | 122.3666667 | 6 | 55419 |
| Isaub | city | Province of Palawan | Philippines | 9.5041667 | 118.5933333 | 49 | 2524 |
| Isca | city | Province of Cagayan | Philippines | 18.2383333 | 121.9775 | 154 | 9233 |
| Isian | city | Province of Iloilo | Philippines | 10.6833333 | 122.3666667 | 6 | 55419 |
| Isian | city | Province of Iloilo | Philippines | 10.7919444 | 122.3691667 | 403 | 36955 |
| Isian Norte | city | Province of Iloilo | Philippines | 10.7919444 | 122.3691667 | 403 | 36955 |
| Isian Victoria | city | Province of Iloilo | Philippines | 10.7833333 | 122.3833333 | 285 | 52451 |
| Isiisioc | city | Province of Ilocos Norte | Philippines | 18.3833333 | 120.75 | 659 | 9282 |
| Ising | city | Province of Davao del Norte | Philippines | 7.3602778 | 125.7022222 | 16 | 56307 |
| Isio | city | Angeles City | Philippines | 9.6 | 122.4666667 | 22 | 9549 |
| Isio | city | Angeles City | Philippines | 9.5516667 | 122.5175 | 45 | 11346 |
| Isio | city | Angeles City | Philippines | 9.9833333 | 122.5833333 | 3 | 13460 |
| Isit | city | Province of Abra | Philippines | 17.6533333 | 120.6666667 | 170 | 24049 |
| Isla | city | Province of Pangasinan | Philippines | 15.8938889 | 120.3036111 | 32 | 127365 |
| Isla | city | Province of Bulacan | Philippines | 14.7 | 120.95 | 19 | 1781761 |
| Isla General | city | Province of Surigao del Sur | Philippines | 9.4166667 | 126.0166667 | 0 | 487 |
| Isla de Cana | city | Province of Iloilo | Philippines | 11.4833333 | 123.25 | 0 | 10220 |
| Isla de CaƱa | city | Province of Iloilo | Philippines | 11.4833333 | 123.25 | 0 | 10220 |
| Isla de Kaulungan | city | Province of Basilan | Philippines | 6.4666667 | 122.2166667 | 0 | 5280 |
| Isla de Linungan | city | Province of Basilan | Philippines | 6.7333333 | 122.25 | 0 | 132 |
| Isla de Norte | city | Province of Palawan | Philippines | 10.9833333 | 120.9333333 | 0 | 814 |
| Isla de Sibago | city | Province of Basilan | Philippines | 6.7488889 | 122.3986111 | 0 | 1103 |
| Isla de Sur | city | Province of Palawan | Philippines | 10.8166667 | 120.9833333 | 0 | 8730 |
| Isla de Ubay | city | Province of Bohol | Philippines | 10.0166667 | 123.9666667 | 0 | 2267 |
| Isla del Oeste | city | Province of Samar | Philippines | 11.9155556 | 124.6397222 | 3 | 1353 |
| Islade Palma | city | Angeles City | Philippines | 10.3333333 | 123.95 | 19 | 409371 |
| Isleta | city | Province of Iloilo | Philippines | 11.3 | 123.15 | 183 | 9722 |
| Isneg | city | Province of Ilocos Norte | Philippines | 18.5 | 120.9166667 | 1394 | 5145 |
| Isneg | city | Province of Kalinga-Apayao | Philippines | 18.5333333 | 121.0833333 | 262 | 7089 |
| Isneg | city | Province of Kalinga-Apayao | Philippines | 18.3305556 | 121.2472222 | 154 | 2652 |
| Iso | city | Angeles City | Philippines | 9.9833333 | 122.5833333 | 3 | 13460 |
| Isugan | city | Province of Negros Oriental | Philippines | 9.25 | 123.3 | 0 | 36535 |
| Isugod | city | Province of Palawan | Philippines | 9.3316667 | 118.1119444 | 36 | 2259 |
| Isulan | city | Province of Maguindanao | Philippines | 7.0333333 | 124.4833333 | 22 | 51529 |
| Isulan | city | Province of Sultan Kudarat | Philippines | 6.6255556 | 124.6036111 | 226 | 42671 |
| Isulon | city | Province of Sultan Kudarat | Philippines | 6.6530556 | 124.6466667 | 203 | 49949 |
| Isuron | city | Province of Pangasinan | Philippines | 15.9833333 | 120.3333333 | 36 | 189811 |