| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| Iglauaan | city | | Philippines | 10.6 | 123.05 | 436 | 134292 |
| Iglauaan Hacienda | city | | Philippines | 10.6 | 123.05 | 436 | 134292 |
| Ilaya | city | | Philippines | 10.1333333 | 122.9 | 223 | 28006 |
| Ilaya | city | | Philippines | 10.6166667 | 123.4666667 | 78 | 21530 |
| Ilimnan | city | | Philippines | 10.0638889 | 122.9294444 | 1020 | 32695 |
| Insigman | city | | Philippines | 10.5333333 | 122.8333333 | 3 | 67444 |
| Isabel Hacienda | city | | Philippines | 10.3833333 | 123.0333333 | 551 | 53322 |
| Isabel Hacienda | city | | Philippines | 10.9 | 123.4166667 | 131 | 42173 |
| Isabela Central | city | | Philippines | 10.2166667 | 123.0333333 | 95 | 40982 |
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