| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| Igubay | city | Province of Zamboanga del Sur | Philippines | 7.5666667 | 123.3333333 | 19 | 32411 |
| Ilisan | city | Province of Zamboanga del Sur | Philippines | 7.5138889 | 122.9866667 | 141 | 13647 |
| Imelda | city | Province of Zamboanga del Sur | Philippines | 7.65 | 123.95 | 0 | 5035 |
| Inasagan | city | Province of Zamboanga del Sur | Philippines | 7.9747222 | 123.5783333 | 656 | 41130 |
| Ipil | city | Province of Zamboanga del Sur | Philippines | 7.7844444 | 122.5861111 | 45 | 13651 |