6 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Sharon Springs | 1 | 888 | 943 | -1.77% | 3 | 342 | Township |
| Sharon Springs | 2 | 724 | 750 | -0.55% | 802 | 1 | City |
| Weskan | 3 | 312 | 331 | -1.58% | 1 | 302 | Township |
| Wallace | 4 | 148 | 166 | -3.9% | 1 | 188 | Township |
| Harrison | 5 | 66 | 72 | -2.94% | 1 | 81 | Township |
| Wallace | 6 | 44 | 46 | 0% | 109 | 0 | City |
Sharon Springs is the largest city in Wallace County, with a population of 888.
Wallace is the smallest city in Wallace County, with a population of 44.
There are 6 cities in Wallace County, Kansas.