21 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 96097 | Yreka | 10,220 |
| 96067 | Mount Shasta | 7,800 |
| 96094 | Weed | 6,674 |
| 96064 | Montague | 4,696 |
| 96032 | Fort Jones | 2,629 |
| 96025 | Dunsmuir | 2,150 |
| 96027 | Etna | 1,872 |
| 96044 | Hornbrook | 1,181 |
| 96023 | Dorris | 1,128 |
| 96057 | Mccloud | 1,076 |
| 96058 | Macdoel | 706 |
| 96039 | Happy Camp | 647 |
| 96038 | Grenada | 399 |
| 96050 | Klamath River | 369 |
| 96034 | Gazelle | 325 |
| 96086 | Seiad Valley | 307 |
| 96014 | Callahan | 285 |
| 95568 | Somes Bar | 201 |
| 96037 | Greenview | 131 |
| 96031 | Forks Of Salmon | 70 |
| 96085 | Scott Bar | 65 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 21 ZCTAs in Siskiyou County, California (US Census).