12 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Goodland | 1 | 4,377 | 4,442 | -0.3% | 972 | 4.50 | City |
| Itasca | 2 | 286 | 292 | -0.35% | 8 | 33.73 | Township |
| Stateline | 3 | 231 | 235 | -0.43% | 4 | 63.66 | Township |
| Voltaire | 4 | 225 | 226 | -0.44% | 1 | 158.83 | Township |
| Kanorado | 5 | 149 | 151 | 0% | 571 | 0.26 | City |
| Smoky | 6 | 80 | 81 | 0% | 1 | 107.95 | Township |
| Grant | 7 | 68 | 69 | 0% | 0.00 | 136.92 | Township |
| Union | 8 | 51 | 54 | -1.92% | 1 | 53.93 | Township |
| Llanos | 9 | 34 | 37 | -2.86% | 0.00 | 71.42 | Township |
| Shermanville | 10 | 31 | 31 | 0% | 0.00 | 71.46 | Township |
| Iowa | 11 | 25 | 25 | 0% | 0.00 | 107.62 | Township |
| Edson | 12 | 11 | 14 | 10% | 16 | 0.70 | CDP |
Goodland is the largest city in Sherman County, with a population of 4,377.
Edson is the smallest city in Sherman County, with a population of 11.
There are 12 cities in Sherman County, Kansas.