5 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Liberal | 1 | 18,507 | 19,737 | -1.31% | 1,540 | 12.02 | City |
| Fargo township | 2 | 1,229 | 1,267 | -0.57% | 6 | 220.12 | Township |
| Liberal township | 3 | 582 | 615 | -1.19% | 3 | 192.67 | Township |
| Kismet | 4 | 326 | 340 | -0.91% | 1,381 | 0.24 | City |
| Seward township | 5 | 221 | 238 | -1.78% | 1 | 214.84 | Township |
Liberal is the largest city in Seward County, with a population of 18,507.
Seward township is the smallest city in Seward County.
There are 5 cities in Seward County, Kansas.