| ZIP Code | ZIP Code Place Name | County | ZIP Code Type |
|---|---|---|---|
| 97447 | Idleyld Park | Douglas County | Standard |
| 97601 | Klamath Falls | Klamath County | Standard |
| 97602 | Klamath Falls | Klamath County | PO Box |
| 97603 | Klamath Falls | Klamath County | Standard |
| 97604 | Crater Lake | Klamath County | PO Box |
| 97621 | Beatty | Klamath County | Standard |
| 97622 | Bly | Klamath County | PO Box |
| 97623 | Bonanza | Klamath County | Standard |
| 97624 | Chiloquin | Klamath County | Standard |
| 97625 | Dairy | Klamath County | Standard |
| 97626 | Fort Klamath | Klamath County | PO Box |
| 97627 | Keno | Klamath County | Standard |
| 97632 | Malin | Klamath County | Standard |
| 97633 | Merrill | Klamath County | Standard |
| 97634 | Midland | Klamath County | PO Box |
| 97639 | Sprague River | Klamath County | Standard |
| 97640 | Summer Lake | Lake County | Standard |
| 97731 | Chemult | Klamath County | Standard |
| 97733 | Crescent | Klamath County | Standard |
| 97737 | Gilchrist | Klamath County | Standard |
| 97739 | La Pine | Deschutes County | Standard |