| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Isabel | city | Basilan | Philippines | 6.70 | 121.97 | 321 | 28792 |
| Isabela | city | Basilan | Philippines | 6.70 | 121.97 | 321 | 28792 |
| Isabela City | city | Basilan | Philippines | 6.70 | 121.97 | 321 | 28792 |
| Isla de Kaulungan | city | Basilan | Philippines | 6.47 | 122.22 | 0 | 4734 |
| Isla de Linungan | city | Basilan | Philippines | 6.73 | 122.25 | 0 | 178 |
| Isla de Sibago | city | Basilan | Philippines | 6.75 | 122.40 | 0 | 1781 |