With 15,860 people, Trinity County is a county in California. At a median age of 54.9, this is an older place than the country as a whole. Households here earn about 47% less than in California as a whole. There are 5 people per square mile. 22% of adults hold a bachelor's degree, below the 36% national rate. The foreign-born share is 5%.
At a glance
Lower income
median household income $53,002, below the US median
US median: $82,259
Older
median age 54.9
US median: 38.9
Less educated
22% hold a bachelor's degree
US average: 36%
Less affordable
home values up 73%, inflation adjusted
US median home: $376,019
Unique to this place
What stands out about Trinity County
What changed most since 1990
Median age37.9 → 54.9(+17.0 years)US over the same years: +6.0 years
Adults with a bachelor's degree12.9% → 22.4%(+9.6 pts)US over the same years: +15.3 pts
Shares are "alone or in combination": a person with both Medicare and Medicaid counts in each, so categories overlap and do not sum to 100%.
Section 09 · Service history
Veterans
Veterans by period of service, 2024
Gulf War (2001 or later)15.2%(181)
US avg: 26.4%
Gulf War (1990s)16.7%(198)
US avg: 24.3%
Vietnam era35.2%(419)
US avg: 33.1%
Korean War4.8%(57)
US avg: 4.5%
World War II0%(0)
US avg: 1%
Share of the 1,189 veterans here. A veteran who served across eras counts in each, so shares can total more than 100%. Peacetime-only service is included in the total but not shown as an era.
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Over time
Trinity County, decade by decade
Trinity County population, inflation-adjusted income and home value, education, and diversity by year
Year
Population
Median household income
Median home value
Bachelor's degree+
Diversity score
1990
13,063
$49,187
$197,286
12.9%
22.0
2000
13,022
$50,480
$188,177
15.5%
30.2
2010
13,786
$55,709
$385,825
19.5%
36.3
2020
16,112
$50,639
$346,280
19.2%
58.7
2024
15,860
$53,002
$325,800
22.4%
46.9
Census years come from the decennial census and the latest year from the American Community Survey, so part of any change between those two rows can reflect the different surveys. Dollar figures are adjusted for inflation to 2024 dollars; a figure ending in "+" was at the Census Bureau's reporting cap that year. The diversity score runs from 0 to 100; see how it's calculated.
