Post Offices in Trinity County, California

There are 13 Post Offices in Trinity County, California, serving a population of 13,037 people in an area of 3,179 square miles. There is 1 Post Office per 1,002 people, and 1 Post Office per 244 square miles.

In California, Trinity County is ranked 3rd of 58 counties in Post Offices per capita, and 47th of 58 counties in Post Offices per square mile.

List of Trinity County Post Offices

Find Trinity County, California post offices and USPS mailing boxes.


Big Bar Post Office 27761 Highway 299 Big Bar, CA

Burnt Ranch Post Office 10271 Highway 299 Burnt Ranch, CA

Douglas City Post Office 140 Steiner Flat Road Douglas City, CA

Hayfork Post Office 7180 Highway 3 Hayfork, CA

Hyampom Post Office 22617 Hyampom Road Hyampom, CA

Junction City Post Office 43380 Highway 299 Junction City, CA

Lewiston Post Office 4391 Trinity Dam Boulevard Lewiston, CA

Mad River Post Office 2515 Highway 36 Mad River, CA

Salyer Post Office 1080 California 299 Salyer, CA

Shasta Post Office 15430 California 299 Burnt Ranch, CA

Trinity Center Post Office 271 Mary Avenue Trinity Center, CA

Weaverville Post Office 50 South Miner Street Weaverville, CA

Zenia Post Office 26531 Ruth Zenia Road Zenia, CA

About Trinity County Post Offices

Trinity County Post Offices are branch locations of the customer service postal facilities of the United States Postal Service (USPS) in Trinity County, CA. The USPS is an independent agency of the federal government that provides mail and package delivery services to all states and territories. Trinity County post offices are supported entirely by revenues generated by their own operations. Operational authority over the USPS lies with a Board of Governors and rate setting authority falls under the Postal Rate Commission.

You may contact the Post Office for questions about:
  • Trinity County Post Office hours and locations
  • Mail and package delivery services
  • Trinity County PO Box services
  • Passport applications and renewals
  • Trinity County Post Office jobs and employment