6 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Leavenworth | 1 | 37,396 | 37,318 | 0.03% | 1,535 | 24 | City |
| Lansing | 2 | 11,356 | 11,235 | 0.18% | 923 | 12 | City |
| Basehor | 3 | 8,527 | 6,933 | 3.22% | 1,194 | 7 | City |
| Tonganoxie | 4 | 6,497 | 5,590 | 2.38% | 1,601 | 4 | City |
| Linwood | 5 | 434 | 415 | 0.7% | 736 | 1 | City |
| Easton | 6 | 214 | 211 | 0.47% | 1,266 | 0 | City |
Leavenworth is the largest city in Leavenworth County, with a population of 37,396.
Easton is the smallest city in Leavenworth County, with a population of 214.
There are 6 cities in Leavenworth County, Kansas.