17 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 97603 | Klamath Falls | 32,212 |
| 97601 | Klamath Falls | 22,751 |
| 97624 | Chiloquin | 3,756 |
| 97623 | Bonanza | 2,954 |
| 97632 | Malin | 1,473 |
| 97633 | Merrill | 1,456 |
| 97733 | Crescent | 592 |
| 97737 | Gilchrist | 525 |
| 97627 | Keno | 445 |
| 97634 | Midland | 370 |
| 97622 | Bly | 276 |
| 97621 | Beatty | 268 |
| 97626 | Fort Klamath | 238 |
| 97731 | Chemult | 218 |
| 97625 | Dairy | 139 |
| 97639 | Sprague River | 9 |
| 97604 | Crater Lake | 0 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 17 ZCTAs in Klamath County, Oregon (US Census).