5 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Klamath Falls | 1 | 22,241 | 21,905 | 0.3% | 1,107 | 20 | City |
| Merrill | 2 | 869 | 861 | 0.12% | 1,893 | 0 | City |
| Chiloquin | 3 | 770 | 763 | 0.13% | 942 | 1 | City |
| Malin | 4 | 742 | 731 | 0.27% | 1,487 | 0 | City |
| Bonanza | 5 | 417 | 405 | 0.48% | 509 | 1 | Town |
Klamath Falls is the largest city in Klamath County, with a population of 22,241.
Bonanza is the smallest city in Klamath County, with a population of 417.
There are 5 cities in Klamath County, Oregon.