19 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Center | 1 | 1,714 | 1,661 | 0.71% | 27 | 63 | Township |
| Iowa | 2 | 1,470 | 1,439 | 0.48% | 18 | 84 | Township |
| Wathena | 3 | 1,267 | 1,245 | 0.32% | 541 | 2 | City |
| Elwood | 4 | 1,148 | 1,114 | 0.53% | 395 | 3 | City |
| Troy | 5 | 991 | 963 | 0.51% | 1,016 | 1 | City |
| Highland | 6 | 937 | 921 | 0.32% | 1,755 | 1 | City |
| Highland | 7 | 376 | 375 | 0.27% | 11 | 35 | Township |
| Wolf River | 8 | 345 | 338 | 0.58% | 6 | 56 | Township |
| Union | 9 | 270 | 268 | 0% | 7 | 36 | Township |
| Elwood | 10 | 201 | 208 | 0% | 2 | 100 | Township |
| Wayne | 11 | 193 | 189 | 0.52% | 5 | 37 | Township |
| Troy | 12 | 134 | 135 | 0% | 4 | 36 | Township |
| Denton | 13 | 134 | 131 | 0.75% | 924 | 0 | City |
| White Cloud | 14 | 116 | 113 | 0.87% | 160 | 1 | City |
| Highland | 15 | 82 | 84 | 0% | 2 | 35 | Township |
| Severance | 16 | 79 | 78 | 0% | 564 | 0 | City |
| Highland | 17 | 53 | 54 | 0% | 1 | 36 | Township |
| Highland | 18 | 47 | 47 | 0% | 1 | 36 | Township |
| Highland | 19 | 19 | 19 | 0% | 1 | 36 | Township |
Center is the largest city in Doniphan County, with a population of 1,714.
Highland is the smallest city in Doniphan County, with a population of 19.
There are 19 cities in Doniphan County, Kansas.