20 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Hays | 1 | 20,982 | 21,126 | -0.14% | 2,428 | 8.64 | City |
| Big Creek township | 2 | 2,104 | 2,082 | 0.33% | 22 | 96.10 | Township |
| Ellis | 3 | 1,895 | 1,960 | -0.68% | 1,144 | 1.66 | City |
| Victoria | 4 | 1,100 | 1,129 | -0.54% | 1,836 | 0.60 | City |
| Herzog township | 5 | 819 | 828 | -0.24% | 7 | 125.65 | Township |
| Victoria township | 6 | 791 | 814 | -0.5% | 15 | 53.73 | Township |
| Walker township | 7 | 657 | 643 | 0.77% | 15 | 44.95 | Township |
| Lookout township | 8 | 529 | 524 | 0.38% | 4 | 122.35 | Township |
| Ellis township | 9 | 431 | 432 | 0% | 2 | 176.02 | Township |
| Buckeye township | 10 | 421 | 422 | 0% | 3 | 136.05 | Township |
| Wheatland township | 11 | 395 | 390 | 0.51% | 7 | 54.15 | Township |
| Victoria township | 12 | 304 | 317 | -1.3% | 8 | 36.22 | Township |
| Catherine township | 13 | 274 | 273 | 0.37% | 3 | 80.41 | Township |
| Catharine | 14 | 243 | 123 | 3.85% | 137 | 1.77 | CDP |
| Schoenchen | 15 | 168 | 170 | 0% | 1,355 | 0.12 | City |
| McCracken | 16 | 140 | 150 | -1.41% | 140 | 1 | City |
| Freedom township | 17 | 97 | 97 | 0% | 2 | 45.15 | Township |
| Zurich | 18 | 78 | 85 | -1.27% | 433 | 0.18 | City |
| Codell | 19 | 62 | 77 | 6.9% | 82 | 0.75 | CDP |
| Munjor | 20 | 59 | 76 | -15.71% | 26 | 2.31 | CDP |
Hays is the largest city in Ellis County, with a population of 20,982.
Munjor is the smallest city in Ellis County.
There are 20 cities in Ellis County, Kansas.