A
| Name of place | Number of counties | Principal county | Lower ZIP code | Upper zip code |
|---|---|---|---|---|
| Aberdeen | 1 | Bingham County | 83210 | |
| Aberdeen Junction | 1 | Bingham County | ||
| Acequia | 1 | Minidoka County | 83350 | |
| Adair | 1 | Shoshone County | ||
| Addie | 1 | Boundary County | ||
| Adelaide | 1 | Minidoka County | ||
| Agatha | 1 | Nez Perce County | ||
| Ahsahka | 1 | Clearwater County | 83520 | |
| Aiken | 1 | Bingham County | ||
| Airport | 1 | Ada County | 83715 | |
| Alameda | 1 | Bannock County | 83201 | |
| Albeni Falls Spur | 1 | Bonner County | ||
| Albion | 1 | Cassia County | 83311 | |
| Aldaphe Heights | 1 | Ada County | ||
| Alder Creek | 1 | Benewah County | ||
| Alexander | 1 | Caribou County | ||
| Algoma | 1 | Bonner County | 83860 | |
| Allendale | 1 | Canyon County | ||
| Allens Spur | 1 | Boundary County | ||
| Almo | 1 | Cassia County | 83312 | |
| Alpha | 1 | Valley County | 83611 | |
| Alpine | 1 | Adams County | 83610 | |
| Alridge | 1 | Bingham County | ||
| Alton | 1 | Bear Lake County | ||
| Aluma | 1 | Canyon County | ||
| Amalga | 1 | Minidoka County | ||
| American Falls | 1 | Power County | 83211 | |
| Ammon | 1 | Bonneville County | 83401 | |
| Amsco | 1 | Canyon County | ||
| Amsterdam | 1 | Twin Falls County | ||
| Anderson | 1 | Franklin County | ||
| Anderson Dam | 1 | Elmore County | 83647 | |
| Annis | 1 | Jefferson County | 83442 | |
| Antelope | 1 | Bonneville County | 83443 | |
| Appleton | 1 | Gooding County | 83338 | |
| Apple Valley | 1 | Canyon County | 83660 | |
| Arbon | 1 | Power County | 83212 | |
| Arbon Valley | 1 | Power County | ||
| Archabal | 1 | Valley County | ||
| Archer | 1 | Madison County | 83440 | |
| Arco | 1 | Butte County | 83213 | |
| Argora | 1 | Clark County | 83423 | |
| Arimo | 1 | Bannock County | 83214 | |
| Arling | 1 | Valley County | ||
| Arrow | 1 | Nez Perce County | ||
| Artesian City | 1 | Twin Falls County | 83344 | |
| Asbestos Point | 1 | Idaho County | ||
| Ashton | 1 | Fremont County | 83420 | |
| Athol | 1 | Kootenai County | 83801 | |
| Atlanta | 1 | Elmore County | 83601 | |
| Atlas | 1 | Kootenai County | ||
| Atomic City | 1 | Bingham County | 83215 | |
| Avery | 1 | Shoshone County | 83802 | |
| Avon | 1 | Latah County | 83823 |
Read more about this topic: List Of Places In Idaho: A-K