California

Trinity

16,112
2020 population
1850
first census record
18
census records

About Trinity

Trinity, California, first appears in the United States federal census in 1850, when it recorded a population of 1,635. At the most recent census, in 2020, its population stood at 16,112.

The county's recorded population has risen across the decades to its highest level in 2020.

On the ground today, 7 documented military engagements have been recorded within the county, among them Trinity River Massacre, Battle of Bridge Gulch (Trinity County Massacre), Wailaki Resistance — Eel River War (1858–1863), and 4 places are listed on the National Register of Historic Places.

Population by decade

Census YearPopulationChart
202016,112
201013,786
200013,022
199013,063
198011,858
19707,615
19609,706
19505,087
19403,970
19302,809
19202,551
19103,301
19004,383
18903,719
18804,999
18703,213
18605,125
18501,635
Source

Population data from the United States decennial census, U.S. Census Bureau (public domain).

Battles & engagements in Trinity

Military engagements that took place in Trinity, California.

Trinity River Massacre
1852
Battle of Bridge Gulch (Trinity County Massacre)
1852
Wailaki Resistance — Eel River War (1858–1863)
1858
Eel River War – Wailaki Engagements 1858
1858
Trinity River Fight — New River area
1858
Bridge Gulch Massacre
1862
Larabee Creek Massacre
1862

Historic places in Trinity

National Register of Historic Places listings in Trinity, California.

Bowerman Barn
Trinity Center
Lewiston Historic District
Lewiston
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Other counties in California

Explore census history and historic records for more California counties.

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Everything a full report reveals about Trinity County, California

This page charts the census history of Trinity County, California. A full Aubrey report for an address here pulls together everything the historical record holds about the ground, from the earliest settlement to the twentieth century:

Overview
An interactive map of the location with historic sites, battles and Native heritage plotted, and its full story era by era.
The Land
The historic sites and place names around the location, and how this land was settled and used.
Geology
The bedrock beneath the site, its age and rock type, reaching back millions of years.
LiDAR Terrain
Laser-scanned terrain that reveals earthworks and old features hidden in the landscape.
Conflict & War
The battles, raids and skirmishes fought near here, across every era of American conflict.
The Civil War
The Civil War on this ground, 1861 to 1865: who held it, and the battles, camps and regiments nearby.
The Soldiers
The men who marched from here in the Civil War, named and traced where the record allows.
Native Heritage
The Native nations who held this land, mapped across time from before European contact to today.
Settlement
Who claimed and held this ground, from Indigenous homelands through the colonial powers to the United States.
The Community
How the town grew, who came, and what kind of place it became, traced through the census record.
Rivers & Rail
The rivers, canals and railroads that connected this place between 1830 and 1911.
Notable People
The people born, buried or genuinely tied to this exact place, with their stories.
Historical Maps
Historic maps of the location layered over how it looks today.
Finds & Access
Museum objects tied to the area, and the laws on searching, collecting and access here.
Literature
The old books, county histories and archives that mention this place, quoted with their sources.
Spotlight
A deep dive into the most remarkable, lesser-known history of the place, traced back to the record.
Points of Interest
The most significant historic sites and landmarks near the location, and why they matter.
Timeline
The whole story of the location told era by era, from first peoples to the present day.
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Frequently asked about Trinity

When does Trinity first appear in the US census?
Trinity, California first appears in the federal census in 1850, with a recorded population of 1,635.
What is the population of Trinity?
At the most recent federal census (2020), Trinity had a recorded population of 16,112.
Were any battles fought in Trinity?
7 documented military engagements took place in Trinity, including Trinity River Massacre, Battle of Bridge Gulch (Trinity County Massacre), Wailaki Resistance — Eel River War (1858–1863).
How many historic places are in Trinity?
4 sites are listed on the National Register of Historic Places in Trinity, California.
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