| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| Iamdagan | city | Province of Ilocos Norte | Philippines | 18.0833333 | 120.8 | 308 | 17434 |
| Isiisioc | city | Province of Ilocos Norte | Philippines | 18.3833333 | 120.75 | 659 | 9282 |
| Isneg | city | Province of Ilocos Norte | Philippines | 18.5 | 120.9166667 | 1394 | 5145 |
|
|