| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Iglesia Vieja | city | Usulutan | El Salvador | 13.28 | -88.45 | 98 | 42180 |
| Ilquilisco | city | Usulutan | El Salvador | 13.32 | -88.58 | 108 | 18937 |
| Isla de Mendez | city | Usulutan | El Salvador | 13.23 | -88.70 | 22 | 5334 |
| Isleta | city | Usulutan | El Salvador | 13.60 | -88.43 | 974 | 16601 |