Trinity County, CA ZIP Codes & Directory
Complete postal guide for Trinity County, California. Featuring the official county seat of Weaverville, largest municipality Weaverville, and serving 10 incorporated municipal entities.
Municipalities Located in Trinity County
Incorporated Cities, Towns, and Villages
Big Bar
cityZIPs: 96010
Burnt Ranch
cityZIPs: 95527
Douglas City
cityZIPs: 96024
Hayfork
cityZIPs: 96041
Junction City
cityZIPs: 96048
Lewiston
cityZIPs: 96052
Mad River
cityZIPs: 95552
Platina
cityZIPs: 96076
Trinity Center
cityZIPs: 96091
Zenia
cityZIPs: 95595
Active USPS ZIP Codes in Trinity County
Standard delivery zones and geographic service boundaries
Frequently Asked Questions About Trinity County, CA
What is the county seat and largest city in Trinity County? ▾
The official county seat of Trinity County is Weaverville, and its largest incorporated municipality by population is Weaverville.
How many cities, towns, and villages are in Trinity County? ▾
Trinity County encompasses 10 incorporated municipal entities, including 10 cities, 0 towns, and 0 villages.
What is the total population and land area of Trinity County? ▾
According to official U.S. Census Bureau data, Trinity County has a population of approximately 16,112 residents and spans an area of 3,179 square miles.
How many ZIP codes operate in Trinity County? ▾
There are 10 active USPS ZIP codes serving addresses within Trinity County, California.