| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Smith Center | 1 | 1,577 | 1,574 | 0.13% | 1,283 | 1 | City |
| Kensington | 2 | 400 | 400 | 0% | 1,194 | 0 | City |
| Lebanon | 3 | 183 | 183 | 0% | 568 | 0 | City |
| Gaylord | 4 | 90 | 89 | 0% | 353 | 0 | City |
| Athol | 5 | 39 | 41 | -2.5% | 211 | 0 | City |
| Cedar | 6 | 12 | 12 | 0% | 67 | 0 | City |
Smith Center is the largest city in Smith County, with a population of 1,577.
Cedar is the smallest city in Smith County, with a population of 12.
There are 6 cities in Smith County, Kansas.