9 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Pocatello | 1 | 59,149 | 56,436 | 0.93% | 1,762 | 33.57 | City |
| Chubbuck | 2 | 16,824 | 15,669 | 1.39% | 2,710 | 6.21 | City |
| Tyhee | 3 | 1,836 | 1,335 | 7.12% | 639 | 2.87 | CDP |
| Inkom | 4 | 855 | 797 | 1.42% | 894 | 0.96 | City |
| Arbon Valley | 5 | 830 | 882 | 1.84% | 24 | 33.88 | CDP |
| McCammon | 6 | 808 | 828 | -0.49% | 363 | 2.23 | City |
| Downey | 7 | 572 | 566 | 0.18% | 587 | 0.97 | City |
| Lava Hot Springs | 8 | 385 | 360 | 1.32% | 560 | 0.69 | City |
| Arimo | 9 | 348 | 352 | -0.29% | 775 | 0.45 | City |
Pocatello is the largest city in Bannock County, with a population of 59,149.
Arimo is the smallest city in Bannock County.
There are 9 cities in Bannock County, Idaho.