5 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Klamath Falls | 1 | 22,308 | 21,905 | 0.3% | 1,110 | 20 | City |
| Merrill | 2 | 871 | 861 | 0.23% | 1,898 | 0 | City |
| Chiloquin | 3 | 772 | 763 | 0.26% | 945 | 1 | City |
| Malin | 4 | 744 | 731 | 0.27% | 1,491 | 0 | City |
| Bonanza | 5 | 420 | 405 | 0.72% | 512 | 1 | Town |
Klamath Falls is the largest city in Klamath County, with a population of 22,308.
Bonanza is the smallest city in Klamath County, with a population of 420.
There are 5 cities in Klamath County, Oregon.