7 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Aurora | 1 | 4,727 | 4,665 | 0.25% | 1,364 | 3 | City |
| Hampton | 2 | 443 | 432 | 0.45% | 1,280 | 0 | Village |
| Giltner | 3 | 419 | 406 | 0.48% | 1,061 | 0 | Village |
| Phillips | 4 | 331 | 319 | 0.61% | 1,130 | 0 | Village |
| Marquette | 5 | 239 | 233 | 0.42% | 1,155 | 0 | Village |
| Hordville | 6 | 135 | 130 | 0.75% | 506 | 0 | Village |
| Lushton | 7 | 29 | 27 | 0% | 204 | 0 | Village |
Aurora is the largest city in Hamilton County, with a population of 4,727.
Lushton is the smallest city in Hamilton County, with a population of 29.
There are 7 cities in Hamilton County, Nebraska.