6 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Leavenworth | 1 | 36,842 | 37,322 | -0.26% | 1,513 | 24.36 | City |
| Lansing | 2 | 11,211 | 11,236 | -0.04% | 912 | 12.30 | City |
| Basehor | 3 | 8,241 | 6,935 | 3.27% | 1,154 | 7.14 | City |
| Tonganoxie | 4 | 6,442 | 5,592 | 2.71% | 1,587 | 4.06 | City |
| Linwood | 5 | 432 | 414 | 0.94% | 732 | 0.59 | City |
| Easton | 6 | 211 | 211 | 0% | 1,249 | 0.17 | City |
Leavenworth is the largest city in Leavenworth County, with a population of 36,842.
Easton is the smallest city in Leavenworth County.
There are 6 cities in Leavenworth County, Kansas.