The state of Idaho, USA is currently served by a total of 2 area codes:
These Idaho area codes overlay (cover the same geographic area). The first code listed is the parent code. Overlay area codes are added when no more phone numbers are available in an existing Numbering Plan Area.
| City | County | Area code(s) |
|---|---|---|
| Boise | Ada | 208/986 |
| Caldwell | Canyon | 208/986 |
| Coeur d'Alene | Kootenai | 208/986 |
| Idaho Falls | Bonneville | 208/986 |
| Lewiston | Nez Perce | 208/986 |
| Meridian | Ada | 208/986 |
| Nampa | Canyon | 208/986 |
| Pocatello | Bannock | 208/986 |
| Post Falls | Kootenai | 208/986 |
| Twin Falls | Twin Falls | 208/986 |