| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Sharon Springs | 1 | 712 | 751 | -0.56% | 788 | 1 | City |
| Wallace | 2 | 44 | 47 | -2.22% | 109 | 0 | City |
Sharon Springs is the largest city in Wallace County, with a population of 712.
Wallace is the smallest city in Wallace County, with a population of 44.
There are 2 cities in Wallace County, Kansas.