38 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Broken Bow | 1 | 3,486 | 3,511 | -0.14% | 1,726 | 2 | City |
| Arnold | 2 | 759 | 762 | -0.52% | 6 | 138 | Township |
| Delight | 3 | 708 | 709 | -0.98% | 9 | 77 | Township |
| Broken Bow | 4 | 687 | 692 | -0.87% | 6 | 124 | Township |
| Sargent | 5 | 597 | 616 | -1.65% | 10 | 58 | Township |
| Ansley | 6 | 594 | 602 | -1.49% | 12 | 51 | Township |
| Arnold | 7 | 591 | 590 | 0% | 882 | 1 | Village |
| Kilfoil | 8 | 582 | 585 | -1.02% | 5 | 115 | Township |
| Callaway | 9 | 568 | 561 | 0.18% | 814 | 1 | Village |
| Sargent | 10 | 478 | 491 | -0.62% | 441 | 1 | City |
| Ansley | 11 | 460 | 460 | 0% | 721 | 1 | Village |
| Merna | 12 | 343 | 342 | 0% | 640 | 1 | Village |
| Victoria | 13 | 327 | 330 | -0.61% | 2 | 162 | Township |
| Algernon | 14 | 291 | 293 | -1.02% | 3 | 92 | Township |
| Berwyn | 15 | 231 | 230 | -0.43% | 3 | 75 | Township |
| Mason City | 16 | 147 | 147 | 0% | 310 | 0 | Village |
| Oconto | 17 | 141 | 140 | 0% | 695 | 0 | Village |
| Comstock | 18 | 129 | 129 | -0.77% | 4 | 31 | Township |
| Westerville | 19 | 129 | 130 | -1.53% | 2 | 69 | Township |
| Lillian | 20 | 126 | 127 | -1.56% | 2 | 78 | Township |
| Cliff | 21 | 125 | 126 | -1.57% | 1 | 99 | Township |
| Garfield | 22 | 109 | 107 | 0.93% | 2 | 66 | Township |
| Elim | 23 | 108 | 109 | -1.82% | 1 | 109 | Township |
| Loup | 24 | 108 | 109 | -1.82% | 1 | 143 | Township |
| Triumph | 25 | 106 | 108 | -1.85% | 2 | 70 | Township |
| Anselmo | 26 | 105 | 109 | -0.94% | 395 | 0 | Village |
| Myrtle | 27 | 100 | 98 | 1.01% | 2 | 54 | Township |
| Ryno | 28 | 97 | 95 | 1.04% | 2 | 54 | Township |
| Custer | 29 | 90 | 90 | -1.1% | 2 | 54 | Township |
| Douglas Grove | 30 | 77 | 75 | 1.32% | 1 | 67 | Township |
| Berwyn | 31 | 75 | 74 | 0% | 294 | 0 | Village |
| Comstock | 32 | 72 | 72 | 0% | 206 | 0 | Village |
| West Union | 33 | 71 | 73 | -1.39% | 2 | 42 | Township |
| Milburn | 34 | 62 | 64 | -1.59% | 1 | 45 | Township |
| East Custer | 35 | 32 | 34 | -3.03% | 1 | 54 | Township |
| Hayes | 36 | 31 | 33 | -3.13% | 0.00 | 181 | Township |
| Corner | 37 | 21 | 21 | 0% | 1 | 36 | Township |
| Spring Creek | 38 | 15 | 15 | 0% | 0.00 | 31 | Township |
Broken Bow is the largest city in Custer County, with a population of 3,486.
Spring Creek is the smallest city in Custer County, with a population of 15.
There are 38 cities in Custer County, Nebraska.