| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Leavenworth | 1 | 36,991 | 37,324 | -0.06% | 1,519 | 24 | City |
| Lansing | 2 | 11,338 | 11,239 | 0.06% | 922 | 12 | City |
| Basehor | 3 | 8,503 | 6,950 | 3.08% | 1,190 | 7 | City |
| Tonganoxie | 4 | 6,350 | 5,591 | 2.29% | 1,565 | 4 | City |
| Linwood | 5 | 435 | 417 | 0.69% | 737 | 1 | City |
| Easton | 6 | 209 | 210 | 0% | 1,237 | 0 | City |
Leavenworth is the largest city in Leavenworth County, with a population of 36,991.
Easton is the smallest city in Leavenworth County, with a population of 209.
There are 6 cities in Leavenworth County, Kansas.