41 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Hutchinson | 1 | 39,431 | 40,008 | -0.29% | 1,604 | 24.58 | City |
| Reno | 2 | 4,337 | 4,349 | 0.02% | 123 | 35.22 | Township |
| South Hutchinson | 3 | 2,497 | 2,519 | -0.16% | 878 | 2.84 | City |
| Clay | 4 | 1,974 | 1,972 | 0.1% | 66 | 30.02 | Township |
| Medora | 5 | 1,676 | 1,660 | 0.3% | 56 | 29.85 | Township |
| Haven | 6 | 1,559 | 1,552 | 0.13% | 28 | 55.23 | Township |
| Grant | 7 | 1,328 | 1,311 | 0.38% | 30 | 44.34 | Township |
| Buhler | 8 | 1,311 | 1,320 | -0.15% | 1,831 | 0.72 | City |
| Haven | 9 | 1,169 | 1,166 | 0.09% | 1,505 | 0.78 | City |
| Nickerson | 10 | 1,045 | 1,064 | -0.38% | 807 | 1.29 | City |
| Valley | 11 | 853 | 840 | 0.35% | 15 | 55.27 | Township |
| Albion | 12 | 838 | 842 | 0.12% | 22 | 37.58 | Township |
| Yoder | 13 | 807 | 804 | 0.25% | 22 | 37.21 | Township |
| Sumner | 14 | 680 | 676 | 0.29% | 17 | 40.60 | Township |
| Pretty Prairie | 15 | 649 | 658 | -0.31% | 1,127 | 0.58 | City |
| Center | 16 | 582 | 584 | -0.17% | 16 | 36.17 | Township |
| Arlington | 17 | 566 | 576 | -0.35% | 16 | 36.17 | Township |
| Salt Creek | 18 | 447 | 448 | 0% | 8 | 54.03 | Township |
| Arlington | 19 | 427 | 436 | -0.47% | 346 | 1.23 | City |
| Miami | 20 | 374 | 375 | 0% | 10 | 37.93 | Township |
| The Highlands | 21 | 346 | 348 | 0% | 338 | 1.02 | City |
| Castleton | 22 | 318 | 314 | 0.63% | 6 | 54.36 | Township |
| Turon | 23 | 306 | 308 | 0% | 688 | 0.45 | City |
| Sylvia | 24 | 284 | 286 | -0.35% | 8 | 35.88 | Township |
| Ninnescah | 25 | 222 | 222 | 0% | 7 | 30.46 | Township |
| Partridge | 26 | 209 | 209 | 0% | 674 | 0.31 | City |
| Sylvia | 27 | 209 | 213 | -0.48% | 723 | 0.29 | City |
| Plevna | 28 | 200 | 200 | 0% | 6 | 36.23 | Township |
| Westminster | 29 | 188 | 190 | 0% | 5 | 36.10 | Township |
| Medford | 30 | 159 | 154 | 1.27% | 5 | 31.93 | Township |
| Langdon | 31 | 120 | 119 | 0% | 3 | 36.30 | Township |
| Huntsville | 32 | 117 | 118 | 0% | 3 | 36.25 | Township |
| Roscoe | 33 | 116 | 117 | 0% | 3 | 37.83 | Township |
| Loda | 34 | 89 | 90 | 0% | 2 | 37.90 | Township |
| Plevna | 35 | 83 | 85 | 0% | 369 | 0.23 | City |
| Abbyville | 36 | 80 | 82 | 0% | 299 | 0.27 | City |
| Bell | 37 | 71 | 72 | 0% | 2 | 37.98 | Township |
| Willowbrook | 38 | 70 | 72 | 0% | 237 | 0.29 | City |
| Hayes | 39 | 60 | 60 | 0% | 1 | 71.93 | Township |
| Grove | 40 | 43 | 43 | 0% | 1 | 36.10 | Township |
| Yoder | 41 | 6 | 163 | -68.42% | 2 | 2.70 | CDP |
Hutchinson is the largest city in Reno County, with a population of 39,431.
Yoder is the smallest city in Reno County, with a population of 6.
There are 41 cities in Reno County, Kansas.