38 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Broken Bow | 1 | 3,562 | 3,512 | 0.28% | 1,763 | 2.02 | City |
| Arnold township | 2 | 771 | 762 | 0.39% | 6 | 137.90 | Township |
| Delight township | 3 | 726 | 705 | 0.69% | 9 | 77.07 | Township |
| Broken Bow township | 4 | 712 | 696 | 0.56% | 6 | 123.88 | Township |
| Sargent township | 5 | 622 | 614 | 0.65% | 11 | 58.24 | Township |
| Ansley township | 6 | 617 | 602 | 0.49% | 12 | 51.06 | Township |
| Kilfoil township | 7 | 599 | 586 | 0.5% | 5 | 115.27 | Township |
| Arnold | 8 | 591 | 590 | 0% | 882 | 0.67 | Village |
| Callaway | 9 | 573 | 558 | 0.53% | 821 | 0.70 | Village |
| Sargent | 10 | 485 | 490 | -0.21% | 447 | 1.08 | City |
| Ansley | 11 | 474 | 461 | 0.64% | 743 | 0.64 | Village |
| Merna | 12 | 351 | 343 | 0.57% | 655 | 0.54 | Village |
| Victoria township | 13 | 331 | 326 | 0.61% | 2 | 161.66 | Township |
| Algernon township | 14 | 300 | 293 | 0.67% | 3 | 92.39 | Township |
| Berwyn township | 15 | 228 | 227 | 0% | 3 | 74.85 | Township |
| Mason City | 16 | 150 | 147 | 0.67% | 316 | 0.47 | Village |
| Oconto | 17 | 140 | 139 | 0% | 690 | 0.20 | Village |
| Comstock township | 18 | 140 | 130 | 2.94% | 5 | 31.10 | Township |
| Westerville township | 19 | 132 | 130 | 0% | 2 | 68.91 | Township |
| Cliff township | 20 | 131 | 126 | 0.77% | 1 | 99.47 | Township |
| Lillian township | 21 | 130 | 128 | 0% | 2 | 77.54 | Township |
| Elim township | 22 | 114 | 109 | 0.88% | 1 | 108.63 | Township |
| Loup township | 23 | 113 | 111 | 0% | 1 | 143.03 | Township |
| Triumph township | 24 | 110 | 108 | 0.92% | 2 | 70.29 | Township |
| Anselmo | 25 | 107 | 109 | 0% | 402 | 0.27 | Village |
| Garfield township | 26 | 106 | 104 | 0.95% | 2 | 65.98 | Township |
| Myrtle township | 27 | 101 | 99 | 1% | 2 | 54.14 | Township |
| Ryno township | 28 | 99 | 97 | 1.02% | 2 | 54.18 | Township |
| Custer township | 29 | 95 | 91 | 1.06% | 2 | 53.82 | Township |
| Douglas Grove township | 30 | 80 | 78 | 1.27% | 1 | 66.90 | Township |
| West Union township | 31 | 75 | 73 | 1.35% | 2 | 41.72 | Township |
| Berwyn | 32 | 73 | 72 | 0% | 286 | 0.26 | Village |
| Comstock | 33 | 73 | 70 | 1.39% | 209 | 0.35 | Village |
| Milburn township | 34 | 65 | 63 | 1.56% | 1 | 45.25 | Township |
| East Custer township | 35 | 32 | 32 | 0% | 1 | 53.86 | Township |
| Hayes township | 36 | 30 | 30 | 0% | 0.00 | 181.18 | Township |
| Corner township | 37 | 21 | 21 | 0% | 1 | 35.64 | Township |
| Spring Creek township | 38 | 15 | 15 | 0% | 0.00 | 31.09 | Township |
Broken Bow is the largest city in Custer County, with a population of 3,562.
Spring Creek township is the smallest city in Custer County.
There are 38 cities in Custer County, Nebraska.