Post Mountain ZIP codes, California
No ZIP code is named for Post Mountain, CA; addresses there use a neighbouring town's name. The ZIP code covering it is 96041. Its area code is 530.
- USPS city name
- 0 ZIP codes
- Overlapping the city
- 1 more
- Population
- 233
- Area code
- 530
- County
- Trinity County
- State
- California
NANPA lists no telephone rate centre for Post Mountain itself, so these are the area codes of the nearest one, Hayfork (0.0 miles). A town on an area-code boundary can differ from its neighbour.
Post Mountain in numbers
About 233 people live in Post Mountain, in 184 households. The median age is 42.9; 79.0% of adults 25 and over hold a bachelor's degree or higher (37.1% across California).
| Population | 233 |
|---|---|
| Households | 184 |
| Median age | 42.9 |
| Bachelor's degree or higher | 79.0% |
| Population density | 19 / sq mi |
U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, for the census place Post Mountain CDP. Survey estimates carry margins of error, wider for small places. Sources and methods.
ZIP codes covering Post Mountain
These ZIP codes cover part of Post Mountain but are addressed as somewhere else.
| ZIP | City | Type | Population | Median income | Median home |
|---|---|---|---|---|---|
96041 | Hayfork , CA | Standard | 2,889 | — | $283,600 |
Map of Post Mountain ZIP codes
The ZIP codes of Post Mountain, CA, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.
Towns near Post Mountain
The nearest larger towns are Ruth (480 people, 10 mi), Hayfork (2,537 people, 12 mi) and Mad River (272 people, 14 mi).
| Town | Population | Distance |
|---|---|---|
| Hayfork | 2,537 | 12.4 mi |
| Weaverville | 4,018 | 27.5 mi |
More nearby: every ZIP code in Trinity County · California ZIP codes
Cite this page
zipcodes.pro. “Post Mountain, CA ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/ca/post-mountain
Underlying data is public domain or openly licensed — sources, vintages and licences.