| Locality | Post Code |
|---|---|
| Piercy, Mendocino | 95587 |
| Point Arena, Mendocino | 95468 |
| Potter Valley, Mendocino | 95469 |
| Pudding Creek, Mendocino | 95437 |
| Redwood Lodge, Mendocino | 95437 |
| Redwood Valley, Mendocino | 95470 |
| Rockport, Mendocino | 95488 |
| Sherwood Valley Rancheria, Mendocino | 95437 |
| Talmage, Mendocino | 95481 |
| Ukiah, Mendocino | 95482 |
| Westport, Mendocino | 95488 |
| Willits, Mendocino | 95490 |
| Yorkville, Mendocino | 95494 |