7 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Pocatello | 1 | 58,680 | 56,434 | 0.77% | 1,687 | 35 | City |
| Chubbuck | 2 | 16,804 | 15,667 | 1.37% | 2,382 | 7 | City |
| Inkom | 3 | 854 | 797 | 1.3% | 893 | 1 | City |
| McCammon | 4 | 823 | 828 | -0.12% | 370 | 2 | City |
| Downey | 5 | 583 | 566 | 0.52% | 599 | 1 | City |
| Lava Hot Springs | 6 | 379 | 359 | 1.07% | 551 | 1 | City |
| Arimo | 7 | 365 | 354 | 0.55% | 813 | 0 | City |
Pocatello is the largest city in Bannock County, with a population of 58,680.
Arimo is the smallest city in Bannock County, with a population of 365.
There are 7 cities in Bannock County, Idaho.