| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Abbey (historical) | city | Idaho | United States | 42.63 | -114.76 | 3599 | |
| Aberdeen | city | Idaho | United States | 42.94 | -112.84 | 4399 | |
| Aberdeen Junction | city | Idaho | United States | 43.22 | -112.47 | 4498 | |
| Abstein Place | city | Idaho | United States | 44.97 | -115.49 | 5285 | |
| Acequia | city | Idaho | United States | 42.67 | -113.60 | 4189 | |
| Adair | city | Idaho | United States | 47.34 | -115.61 | 4189 | |
| Addie | city | Idaho | United States | 48.95 | -116.17 | 2700 | |
| Adelaide | city | Idaho | United States | 42.81 | -113.72 | 4363 | |
| Advent Hollow (historical) | city | Idaho | United States | 46.84 | -116.98 | 3395 | |
| Agatha | city | Idaho | United States | 46.51 | -116.58 | 1003 | |
| Ahsahka | city | Idaho | United States | 46.50 | -116.32 | 1079 | |
| Aiken | city | Idaho | United States | 43.21 | -112.41 | 4478 | |
| Aikman (historical) | city | Idaho | United States | 43.82 | -116.41 | 3349 | |
| Alameda | city | Idaho | United States | 42.89 | -112.45 | 4543 | |
| Albion | city | Idaho | United States | 42.41 | -113.58 | 5029 | |
| Alder City (historical) | city | Idaho | United States | 43.87 | -113.52 | 5869 | |
| Alder Creek | city | Idaho | United States | 47.22 | -116.61 | 2522 | |
| Alexander | city | Idaho | United States | 42.65 | -111.71 | 5921 | |
| Algoma | city | Idaho | United States | 48.20 | -116.57 | 2509 | |
| Allendale | city | Idaho | United States | 43.68 | -116.87 | 2509 | |
| Allens Spur | city | Idaho | United States | 48.74 | -116.37 | 1797 | |
| Almo | city | Idaho | United States | 42.10 | -113.63 | 5374 | |
| Alpha | city | Idaho | United States | 44.39 | -116.01 | 5029 | |
| Alpine | city | Idaho | United States | 44.59 | -116.49 | 2933 | |
| Alridge | city | Idaho | United States | 43.21 | -112.00 | 5029 | |
| Alton | city | Idaho | United States | 42.23 | -111.15 | 6171 | |
| Alturas City (historical) | city | Idaho | United States | 43.80 | -115.16 | 5200 | |
| Amalga | city | Idaho | United States | 42.58 | -113.72 | 4189 | |
| American Falls | city | Idaho | United States | 42.79 | -112.85 | 4429 | |
| Ammon | city | Idaho | United States | 43.47 | -111.97 | 5029 | |
| Amsco | city | Idaho | United States | 43.76 | -116.65 | 2509 | |
| Amsterdam | city | Idaho | United States | 42.30 | -114.58 | 5029 | |
| Anderson | city | Idaho | United States | 42.02 | -111.96 | 4537 | |
| Anderson Place | city | Idaho | United States | 42.24 | -114.95 | 5869 | |
| Annis | city | Idaho | United States | 43.73 | -111.94 | 5029 | |
| Antelope (historical) | city | Idaho | United States | 43.67 | -113.64 | 6709 | |
| Apple Valley | city | Idaho | United States | 43.84 | -117.00 | 2509 | |
| Appleton | city | Idaho | United States | 42.75 | -114.64 | 3487 | |
| Arbon | city | Idaho | United States | 42.46 | -112.57 | 5167 | |
| Archabal | city | Idaho | United States | 44.85 | -116.12 | 5029 | |
| Archer | city | Idaho | United States | 43.71 | -111.78 | 5029 | |
| Arco | city | Idaho | United States | 43.64 | -113.30 | 5383 | |
| Arimo | city | Idaho | United States | 42.56 | -112.17 | 5029 | |
| Arling | city | Idaho | United States | 44.63 | -116.05 | 5029 | |
| Arrow | city | Idaho | United States | 46.48 | -116.77 | 1197 | |
| Artesian City | city | Idaho | United States | 42.42 | -114.16 | 4288 | |
| Asbestos Point | city | Idaho | United States | 45.82 | -115.94 | 3405 | |
| Ashton | city | Idaho | United States | 44.07 | -111.45 | 5282 | |
| Aspendale | city | Idaho | United States | 46.68 | -116.50 | 2775 | |
| Athol | city | Idaho | United States | 47.95 | -116.71 | 2509 | |
| Atlanta | city | Idaho | United States | 43.80 | -115.13 | 5869 | |
| Atlas | city | Idaho | United States | 47.70 | -116.83 | 2509 | |
| Atomic City | city | Idaho | United States | 43.44 | -112.81 | 5029 | |
| Austin (historical) | city | Idaho | United States | 42.66 | -114.85 | 3349 | |
| Avery | city | Idaho | United States | 47.25 | -115.81 | 2919 | |
| Avon | city | Idaho | United States | 46.83 | -116.61 | 2798 |