Trinity County, California

Trinity County
Interactive map of Trinity County
Location in California
CountryUnited States
StateCalifornia
RegionNorth Coast
IncorporatedFebruary 18, 1850
Named afterTrinity River
County seatWeaverville
Largest communityWeaverville
Government
 • TypeCouncil–CAO
 • ChairHeidi Carpenter-Harris
 • Vice ChairJulia Brownfield
 • Board of Supervisors
Supervisors
  • Ric Leutwyler
  • Jill Cox
  • Liam Gogan
  • Heidi Carpenter-Harris
  • Julia Brownfield
 • County administrative officerTrent Tuthill
Area
 • Total
3,208 sq mi (8,310 km2)
 • Land3,179 sq mi (8,230 km2)
 • Water28 sq mi (73 km2)
Highest elevation
9,037 ft (2,754 m)
Population
 • Total
16,112
 • Estimate 
(2024)
15,642
 • Density5.068/sq mi (1.957/km2)
GDP
 • Total$0.466 billion (2022)
Time zoneUTC−8 (Pacific Time Zone)
 • Summer (DST)UTC−7 (Pacific Daylight Time)
Area code530
FIPS code06-105
GNIS feature ID277317
Congressional district2nd
Websitewww.trinitycounty.org

Trinity County is a county located in the northwestern portion of the U.S. state of California. Trinity County is rugged, mountainous, heavily forested, and lies along the Trinity River (for which it is named) within the Salmon, Klamath Mountains, as well as a portion of the Scott, Trinity, and North Yolla Bolly Mountains. It is also one of three counties in California with no incorporated cities (the other two counties in California with that distinction are Alpine and Mariposa counties).

As of the 2020 census, the population was 16,112, making it the fifth least-populous county in California, and the least-populous of California's 27 original counties. The county seat and largest community is Weaverville.