22 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Klamath Falls | 1 | 22,241 | 21,787 | 0.3% | 1,107 | 20 | City |
| Klamath Falls | 2 | 22,241 | 21,905 | 0.3% | 1,107 | 20 | City |
| Altamont | 3 | 20,617 | 18,982 | 0.44% | 2,554 | 8 | CDP |
| Keno | 4 | 2,351 | 2,010 | 7.16% | 254 | 9 | CDP |
| Running Y Ranch | 5 | 1,040 | 930 | 7.11% | 219 | 5 | CDP |
| Falcon Heights | 6 | 1,022 | 642 | 7.13% | 2,445 | 0 | CDP |
| Merrill | 7 | 869 | 860 | 0.12% | 1,893 | 0 | City |
| Merrill | 8 | 869 | 861 | 0.12% | 1,893 | 0 | City |
| Chiloquin | 9 | 770 | 762 | 0.13% | 942 | 1 | City |
| Chiloquin | 10 | 770 | 763 | 0.13% | 942 | 1 | City |
| Malin | 11 | 742 | 731 | 0.27% | 1,487 | 0 | City |
| Malin | 12 | 742 | 731 | 0.27% | 1,487 | 0 | City |
| Oregon Shores | 13 | 485 | 413 | 7.06% | 439 | 1 | CDP |
| Bonanza | 14 | 417 | 405 | 0.48% | 509 | 1 | Town |
| Bonanza | 15 | 417 | 405 | 0.48% | 509 | 1 | Town |
| Gilchrist | 16 | 386 | 163 | 7.22% | 1,016 | 0 | CDP |
| Rocky Point | 17 | 385 | 203 | 7.24% | 210 | 2 | CDP |
| Crescent | 18 | 348 | 358 | 7.41% | 298 | 1 | CDP |
| Bly | 19 | 158 | 126 | 7.48% | 187 | 1 | CDP |
| Fort Klamath | 20 | 130 | 31 | 7.44% | 542 | 0 | CDP |
| Chemult | 21 | 120 | 171 | 7.14% | 465 | 0 | CDP |
| Beatty | 22 | 22 | 43 | 4.76% | 23 | 1 | CDP |
Klamath Falls is the largest city in Klamath County, with a population of 22,241.
Beatty is the smallest city in Klamath County, with a population of 22.
There are 22 cities in Klamath County, Oregon.