11 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Broken Bow | 1 | 3,481 | 3,511 | -0.14% | 1,723 | 2 | City |
| Arnold | 2 | 591 | 590 | 0% | 882 | 1 | Village |
| Callaway | 3 | 570 | 561 | 0.35% | 817 | 1 | Village |
| Sargent | 4 | 476 | 491 | -0.42% | 439 | 1 | City |
| Ansley | 5 | 460 | 460 | 0% | 721 | 1 | Village |
| Merna | 6 | 343 | 342 | 0% | 640 | 1 | Village |
| Mason City | 7 | 147 | 147 | 0% | 310 | 0 | Village |
| Oconto | 8 | 141 | 140 | 0% | 695 | 0 | Village |
| Anselmo | 9 | 104 | 109 | -0.95% | 391 | 0 | Village |
| Berwyn | 10 | 75 | 74 | 0% | 294 | 0 | Village |
| Comstock | 11 | 72 | 72 | 0% | 206 | 0 | Village |
Broken Bow is the largest city in Custer County, with a population of 3,481.
Comstock is the smallest city in Custer County, with a population of 72.
There are 11 cities in Custer County, Nebraska.