12 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| McCook | 1 | 7,161 | 7,427 | -0.71% | 1,312 | 5 | City |
| McCook | 2 | 7,161 | 7,414 | -0.71% | 1,312 | 5 | City |
| Curtis | 3 | 809 | 810 | 0% | 674 | 1 | City |
| Curtis | 4 | 809 | 806 | 0% | 674 | 1 | City |
| Eustis | 5 | 402 | 393 | 0.5% | 950 | 0 | Village |
| Eustis | 6 | 402 | 391 | 0.5% | 950 | 0 | Village |
| Maywood | 7 | 262 | 264 | 0% | 413 | 1 | Village |
| Maywood | 8 | 262 | 262 | 0% | 413 | 1 | Village |
| Moorefield | 9 | 24 | 24 | 0% | 144 | 0 | Village |
| Moorefield | 10 | 24 | 24 | 0% | 144 | 0 | Village |
| Stockville | 11 | 21 | 21 | 0% | 80 | 0 | Village |
| Stockville | 12 | 21 | 21 | 0% | 80 | 0 | Village |
McCook is the largest city in Frontier County, with a population of 7,161.
Stockville is the smallest city in Frontier County, with a population of 21.
There are 12 cities in Frontier County, Nebraska.