Trinity County, California Population 2026

Updated April 2026 · US Census ACS 2023 5-Year Estimates · 54th-largest in California

The population of Trinity County, California is 15,886 as of the 2023 American Community Survey, making it the 54th-largest county in California. The median household income is $53,498, the median home value is $329,000, and the median age is 54.8.

The population of Trinity County has grown 13.7% since 2010 (13,755 → 15,642), a +0.92% annualized rate.

Trinity County within California · Source: US Census TIGER/Line via us-atlas

15,886

Population

+0.92%

Annual growth

People / sq mi

$53,498

Median Income

$329,000

Median Home Value

Trinity County covers 3,179 sq mi of land at 5.0 people per square mile.

About Trinity County, CA

Trinity County is a county in California with a population of 15,886. It ranks #54 among counties in California by population. The median age is 54.8, older than the national median. The population is 48.9% male and 51.1% female.

The median household income in Trinity County is $53,498, below the US median of $74,580. 6.9% of residents live below the federal poverty level. Home values sit at a median of $329,000, with monthly rent averaging $922. The homeownership rate of 73.0% is higher than the national rate of 64.8%.

Educational attainment in Trinity County reflects 18.0% of adults 25 and older holding a bachelor's degree or higher, below the national average of 34.3%. Roughly 25.9% of workers primarily work from home, noticeably above the national work-from-home rate of 14.2%. The average commute is 26.6 minutes each way.

Trinity County Population History (2010-2024)

The county of Trinity County had a population of 13,755 in 2010 and 15,642 in 2024, a 13.7% growth over 14 years. The peak was 16,102 in 2021. Average annual growth rate: 1.20%.

15,642

Population (2024)

13,755

Population (2010)

16,102

Peak (2021)

1.20%

Avg Annual Growth

Year	Population	Change	Annual %	Source
2010	13,755	-	-	estimate
2011	13,685	-70	-0.51%	estimate
2012	13,494	-191	-1.40%	estimate
2013	13,427	-67	-0.50%	estimate
2014	13,126	-301	-2.24%	estimate
2015	13,094	-32	-0.24%	estimate
2016	12,827	-267	-2.04%	estimate
2017	12,727	-100	-0.78%	estimate
2018	12,598	-129	-1.01%	estimate
2019	12,337	-261	-2.07%	estimate
2020	16,095	+3,758	+30.46%	estimate
2021	16,102	+7	+0.04%	estimate
2022	15,777	-325	-2.02%	estimate
2023	15,684	-93	-0.59%	estimate
2024	15,642	-42	-0.27%	estimate

Race & Ethnicity

White	80.5%
Black or African American	0.9%
Asian	0.0%
Hispanic or Latino (any race)	5.6%
Two or More Races	0.5%

Age & Sex

54.8

Median Age

51.1%

Female

48.9%

Male

29.3%

Age 65+

Age Distribution

Under 5

4.3%

5–9

4.8%

10–14

6.1%

15–19

5.1%

20–24

2.3%

25–34

7.2%

35–44

10.3%

45–54

10.2%

55–59

8.4%

60–64

11.9%

65–74

18.0%

75–84

8.5%

85+

2.8%

Children (under 15): 15.2% · Seniors (65+): 29.3%

Income & Poverty

Median household income	$53,498$-42,836 vs state
Mean household income	$80,934
Per-capita income	$32,271
Poverty rate	6.9%-1.5% vs state
Unemployment rate	2.3%
Employment-to-population	37.2%

Top Industries by Employment

Education & health care

19.8%

Professional & business services

15.8%

Construction

15.6%

Agriculture

10.1%

Retail trade

6.6%

Public administration

6.6%

Finance & real estate

6.1%

Information

3.0%

The largest employment sector in Trinity County is education & health care, accounting for 19.8% of workers.

How residents commute

1.5%

Drive alone

0.9%

Carpool

62.4%

Public transit

25.9%

Work from home

26.6 min

Avg commute

Housing

$329,000$-366,400 vs state

Median home value

$922

Median rent

73.0%

Homeownership rate

8,122

Total housing units

66.2%

Occupied

33.8%

Vacant

27.0%

Renter-occupied

Social & access

87.6%

With health insurance

85.8%

With broadband internet

20.6%

Foreign-born

9.0%

Veterans (18+)

17.7%

With a disability

90.9%

Speak language other than English at home

Education

94.8%

High School+

18.0%

Bachelor's+

Largest cities in California

Los Angeles (3,857,897)San Diego (1,385,061)San Jose (990,054)San Francisco (836,321)Fresno (543,615)Sacramento (524,802)Long Beach (458,491)Oakland (438,072)Bakersfield (408,366)Anaheim (344,553)All California cities →

Other counties in California

Los Angeles County (9,848,406)San Diego County (3,282,782)Orange County (3,164,063)Riverside County (2,449,909)San Bernardino County (2,187,816)Santa Clara County (1,903,297)Alameda County (1,651,949)Sacramento County (1,584,047)Contra Costa County (1,161,458)Fresno County (1,012,152)All California counties →

Part of California

California demographic profile All California data →

Metro areas in California

Los Angeles (13,012,469)San Francisco (4,653,593)Riverside (4,637,725)San Diego (3,282,782)Sacramento (2,406,563)San Jose (1,969,353)Fresno (1,170,942)Bakersfield (910,433)All US metros →

County rankings

US Counties by Population Richest US Counties by Median Household Income Expensive US Counties by Home Value Educated US Counties Counties With Highest Poverty Rates Youngest US Counties by Median Age Oldest US Counties by Median Age Cheapest US Counties by Median Home Value Racially Diverse US Counties Counties With Largest Hispanic Population All rankings →

Frequently Asked Questions

Trinity County, California has a population of 15,886 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 54th-largest county in California. Population density is 5 people per square mile.

The population of Trinity County has grown 13.7% since 2010 (13,755 → 15,642), a +0.92% annualized rate.

The median household income in Trinity County, California is $53,498, with mean (average) household income of $80,934 and per-capita income of $32,271. 6.9% of residents live below the federal poverty level.

In Trinity County, the largest racial and ethnic groups are White (80.5%), Hispanic or Latino (5.6%), Black or African American (0.9%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.

The median age in Trinity County, California is 54.8 years. Residents are 51.1% female and 48.9% male.

The median home value in Trinity County is $329,000 and median monthly rent is $922. 73.0% of occupied housing units are owner-occupied. The county has 8,122 total housing units, 33.8% of which are vacant.

The largest employment sector in Trinity County, California is education, health care, and social assistance, employing 19.8% of workers. The unemployment rate is 2.3%.

Los Angeles is among the largest cities associated with Trinity County, California, with a population of 3,857,897.