34 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Creighton | 1 | 1,096 | 1,149 | -0.81% | 906 | 1 | City |
| Bloomfield | 2 | 918 | 983 | -1.18% | 1,125 | 1 | City |
| Center | 3 | 783 | 743 | 0.13% | 23 | 34 | Township |
| Hill | 4 | 766 | 759 | 0% | 11 | 67 | Township |
| Crofton | 5 | 759 | 755 | 0.13% | 1,186 | 1 | City |
| Verdigre | 6 | 613 | 635 | -0.81% | 17 | 36 | Township |
| Wausa | 7 | 577 | 591 | -0.35% | 1,101 | 1 | Village |
| Verdigre | 8 | 528 | 545 | -0.56% | 964 | 1 | Village |
| Santee | 9 | 429 | 423 | 0.23% | 761 | 1 | Village |
| Niobrara | 10 | 411 | 416 | -0.24% | 18 | 22 | Township |
| Niobrara | 11 | 359 | 365 | -0.28% | 493 | 1 | Village |
| Eastern | 12 | 259 | 254 | 0.39% | 7 | 36 | Township |
| Creighton | 13 | 202 | 202 | 0% | 6 | 35 | Township |
| Center | 14 | 188 | 188 | 0% | 5 | 36 | Township |
| Morton | 15 | 168 | 165 | 0.6% | 5 | 35 | Township |
| North Frankfort | 16 | 166 | 166 | 0% | 51 | 3 | Township |
| Peoria | 17 | 140 | 143 | -0.71% | 4 | 36 | Township |
| Dolphin | 18 | 125 | 128 | -0.79% | 3 | 36 | Township |
| Addison | 19 | 122 | 125 | -0.81% | 3 | 36 | Township |
| Columbia | 20 | 114 | 116 | -0.87% | 3 | 36 | Township |
| Cleveland | 21 | 113 | 115 | -0.88% | 3 | 36 | Township |
| Jefferson | 22 | 106 | 108 | -0.93% | 3 | 36 | Township |
| Dowling | 23 | 105 | 107 | -0.94% | 3 | 36 | Township |
| Herrick | 24 | 90 | 90 | 0% | 5 | 19 | Township |
| Frankfort | 25 | 87 | 89 | -1.14% | 5 | 18 | Township |
| Walnut Grove | 26 | 85 | 82 | 1.19% | 2 | 53 | Township |
| Central | 27 | 79 | 81 | -1.25% | 2 | 36 | Township |
| Spade | 28 | 70 | 65 | 2.94% | 2 | 35 | Township |
| Center | 29 | 69 | 74 | -1.43% | 657 | 0 | Village |
| Sparta | 30 | 65 | 67 | -1.52% | 2 | 35 | Township |
| Logan | 31 | 63 | 61 | 1.61% | 2 | 36 | Township |
| Winnetoon | 32 | 53 | 53 | 0% | 183 | 0 | Village |
| Bohemia | 33 | 44 | 42 | 2.33% | 1 | 34 | Township |
| Verdel | 34 | 41 | 40 | 0% | 237 | 0 | Village |
Creighton is the largest city in Knox County, with a population of 1,096.
Verdel is the smallest city in Knox County, with a population of 41.
There are 34 cities in Knox County, Nebraska.