7 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Pocatello | 1 | 59,129 | 56,434 | 0.77% | 1,700 | 35 | City |
| Chubbuck | 2 | 17,032 | 15,667 | 1.36% | 2,415 | 7 | City |
| Inkom | 3 | 866 | 797 | 1.41% | 906 | 1 | City |
| McCammon | 4 | 822 | 828 | -0.12% | 369 | 2 | City |
| Downey | 5 | 587 | 566 | 0.69% | 603 | 1 | City |
| Lava Hot Springs | 6 | 383 | 359 | 1.06% | 557 | 1 | City |
| Arimo | 7 | 367 | 354 | 0.55% | 817 | 0 | City |
Pocatello is the largest city in Bannock County, with a population of 59,129.
Arimo is the smallest city in Bannock County, with a population of 367.
There are 7 cities in Bannock County, Idaho.