| Zip Code | City | Population ↓ |
|---|---|---|
| 96093 | Weaverville | 3,959 |
| 96041 | Hayfork | 3,511 |
| 96052 | Lewiston | 2,538 |
| 96048 | Junction City | 1,283 |
| 96024 | Douglas City | 1,105 |
| 95563 | Salyer | 911 |
| 95527 | Burnt Ranch | 701 |
| 96091 | Trinity Center | 693 |
| 95552 | Mad River | 423 |
| 96046 | Hyampom | 328 |
| 96076 | Platina | 152 |
| 95595 | Zenia | 143 |
| 96010 | Big Bar | 28 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 13 ZCTAs in Trinity County, California (US Census).