6 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Smith Center | 1 | 1,594 | 1,571 | 0.32% | 1,297 | 1.23 | City |
| Kensington | 2 | 406 | 401 | 0.25% | 1,212 | 0.34 | City |
| Lebanon | 3 | 182 | 181 | 0% | 565 | 0.32 | City |
| Gaylord | 4 | 86 | 85 | 0% | 337 | 0.26 | City |
| Athol | 5 | 41 | 41 | 0% | 222 | 0.18 | City |
| Cedar | 6 | 12 | 12 | 0% | 67 | 0.18 | City |
Smith Center is the largest city in Smith County, with a population of 1,594.
Cedar is the smallest city in Smith County.
There are 6 cities in Smith County, Kansas.