I
| Name of place | Number of counties | Principal county | Lower zip code | Upper zip code |
|---|---|---|---|---|
| Idaho City | 1 | Boise County | 83631 | |
| Idaho Falls | 1 | Bonneville County | 83401 | 06 |
| Idahome | 1 | Cassia County | 83323 | |
| Idavada | 1 | Twin Falls County | ||
| Idmon | 1 | Clark County | 83423 | |
| Indian | 1 | Bonneville County | ||
| Indian Cove | 1 | Owyhee County | 83627 | |
| Indian Grove | 1 | Cassia County | ||
| Indian Head Rock | 1 | Camas County | ||
| Indian Valley | 1 | Adams County | 83632 | |
| Ingard | 1 | Payette County | ||
| Inkom | 1 | Bannock County | 83245 | |
| Iona | 1 | Bonneville County | 83427 | |
| Ireland Springs | 1 | Oneida County | ||
| Irwin | 1 | Bonneville County | 83428 | |
| Island Park | 1 | Fremont County | 83429 | |
| Island Park | 1 | Fremont County | ||
| Iversons | 1 | Cassia County |
Read more about this topic: List Of Places In Idaho: A-K