26 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Belleville | 1 | 1,979 | 1,999 | -0.2% | 963 | 2 | City |
| Belleville | 2 | 499 | 513 | -1.19% | 8 | 59 | Township |
| Scandia | 3 | 408 | 418 | -0.73% | 11 | 36 | Township |
| Courtland | 4 | 379 | 386 | -0.52% | 10 | 36 | Township |
| Scandia | 5 | 334 | 341 | -0.3% | 709 | 0 | City |
| Courtland | 6 | 289 | 293 | -0.34% | 1,074 | 0 | City |
| Belleville | 7 | 201 | 206 | -0.5% | 6 | 34 | Township |
| Richland | 8 | 192 | 201 | -1.54% | 5 | 36 | Township |
| Cuba | 9 | 137 | 139 | 0% | 476 | 0 | City |
| Albion | 10 | 130 | 132 | 0% | 4 | 36 | Township |
| Freedom | 11 | 128 | 137 | -2.29% | 4 | 35 | Township |
| Big Bend | 12 | 125 | 129 | -0.79% | 4 | 36 | Township |
| Norway | 13 | 125 | 128 | -0.79% | 4 | 36 | Township |
| Elk Creek | 14 | 110 | 111 | 0% | 3 | 36 | Township |
| Rose Creek | 15 | 107 | 107 | 0% | 3 | 36 | Township |
| Beaver | 16 | 99 | 102 | -1% | 3 | 35 | Township |
| Munden | 17 | 97 | 97 | 0% | 522 | 0 | City |
| Jefferson | 18 | 88 | 91 | -1.12% | 2 | 37 | Township |
| Narka | 19 | 79 | 83 | -1.25% | 494 | 0 | City |
| Republic | 20 | 77 | 81 | -1.28% | 330 | 0 | City |
| White Rock | 21 | 74 | 74 | 0% | 2 | 36 | Township |
| Grant | 22 | 59 | 59 | 0% | 2 | 36 | Township |
| Farmington | 23 | 49 | 49 | 0% | 1 | 36 | Township |
| Agenda | 24 | 43 | 45 | 0% | 249 | 0 | City |
| Union | 25 | 30 | 30 | 0% | 1 | 36 | Township |
| Norway | 26 | 11 | 16 | 10% | 5 | 2 | CDP |
Belleville is the largest city in Republic County, with a population of 1,979.
Norway is the smallest city in Republic County, with a population of 11.
There are 26 cities in Republic County, Kansas.