Data / Median age on 1 July (US county estimates) / Trinity County

Median age on 1 July (US county estimates) in Trinity County

Median age on 1 July (US county estimates) in Trinity County was 49.8 years in 2025, according to the U.S. Census Bureau. That is up 0.5 from 2024. That is the 6th highest of 58 counties in 2025.

2025, years49.8
Change on 2024+0.5
Rank6th of 58Counties in California ranked
Series high50.22014
Series low47.72021

Next release: Friday, 25 June 2027, estimated by Invokely from past publication dates (low confidence), not announced by the publisher. Release calendar

Get an email when a new figure is out or this one is revised.
Keep it in a collection in your library.

Median age on 1 July (US county estimates) in Trinity County, 2010 to 2025

47.54848.54949.55050.52010201320162019202220252010: 49.3 years2011: 49.4 years2012: 49.8 years2013: 50 years2014: 50.2 years2015: 49.8 years2016: 49.5 years2017: 49 years2018: 48.5 years2019: 47.9 years2020: 48 years2021: 47.7 years2022: 48.3 years2023: 48.8 years2024: 49.3 years2025: 49.8 years47484950512010201620252010: 49.3 years2011: 49.4 years2012: 49.8 years2013: 50 years2014: 50.2 years2015: 49.8 years2016: 49.5 years2017: 49 years2018: 48.5 years2019: 47.9 years2020: 48 years2021: 47.7 years2022: 48.3 years2023: 48.8 years2024: 49.3 years2025: 49.8 years
years. Source: U.S. Census Bureau, Population Estimates Program, county population by age and sex: median age (MEDIAN_AGE_TOT) on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage. Retrieved 2026-10-12, published 2026-06-25.
All 16 values
Periodyears
202549.8
202449.3
202348.8
202248.3
202147.7
202048
201947.9
201848.5
201749
201649.5
201549.8
201450.2
201350
201249.8
201149.4
201049.3

Trinity County compared with nearby places

Alameda County: 39.6 yearsAlpine County: 51.4 yearsAmador County: 50.2 yearsButte County: 37.9 yearsCalaveras County: 50.2 yearsColusa County: 36.3 yearsContra Costa County: 41.4 yearsDel Norte County: 41.4 yearsEl Dorado County: 46.8 yearsFresno County: 34.3 yearsGlenn County: 38 yearsHumboldt County: 41 yearsImperial County: 34.8 yearsInyo County: 44.9 yearsKern County: 33.7 yearsKings County: 33.7 yearsLake County: 44.1 yearsLassen County: 38.7 yearsLos Angeles County: 39.1 yearsMadera County: 35 yearsMarin County: 48 yearsMariposa County: 49.2 yearsMendocino County: 45 yearsMerced County: 32.9 yearsModoc County: 48.6 yearsMono County: 41.4 yearsMonterey County: 36.5 yearsNapa County: 44.4 yearsNevada County: 49.3 yearsOrange County: 40.4 yearsPlacer County: 42.7 yearsPlumas County: 52.6 yearsRiverside County: 37.8 yearsSacramento County: 38 yearsSan Benito County: 37.6 yearsSan Bernardino County: 35.9 yearsSan Diego County: 38 yearsSan Francisco County: 40 yearsSan Joaquin County: 36.3 yearsSan Luis Obispo County: 41.7 yearsSan Mateo County: 41.3 yearsSanta Barbara County: 35.9 yearsSanta Clara County: 38.4 yearsSanta Cruz County: 41.5 yearsShasta County: 42.4 yearsSierra County: 55.2 yearsSiskiyou County: 48 yearsSolano County: 40.1 yearsSonoma County: 44.1 yearsStanislaus County: 36 yearsSutter County: 37.4 yearsTehama County: 40.4 yearsTrinity County: 49.8 yearsTulare County: 33.2 yearsTuolumne County: 48.1 yearsVentura County: 40.9 yearsYolo County: 32.2 yearsYuba County: 35.2 years
  • Under 36
  • 36 to 38
  • 38 to 40
  • 40 to 42
  • 42 to 48
  • 48 and over
Median age on 1 July (US county estimates), 2025, years. Trinity County is outlined. Same source and period for every area shown. Source: U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

Rankings

Definition

Age that divides the resident population of a US county into two halves of equal size on 1 July, from Census Bureau population estimates calculated by single year of age.

Counties only: the county file has no state or national medians, and medians cannot be added up. A single-year estimate, unlike median_age, which for US places is a five-year American Community Survey estimate.

Report a problem with this figure

How to cite

U.S. Census Bureau. Population Estimates Program, county population by age and sex: median age (MEDIAN_AGE_TOT) on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Retrieved 2026-10-12.

Citation styles

The publisher is the author. Invokely is named only as the place the figures were read, where a style asks for it.

APA 7

U.S. Census Bureau. (2026). Population Estimates Program, county population by age and sex: median age (MEDIAN_AGE_TOT) on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage (Median age on 1 July (US county estimates), Trinity County, 2010 to 2025) [Data set]. Retrieved October 12, 2026, from https://www.census.gov/programs-surveys/popest/data/data-sets.html

MLA 9

Population Estimates Program, county population by age and sex: median age (MEDIAN_AGE_TOT) on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage, Median age on 1 July (US county estimates), Trinity County, 2010 to 2025. U.S. Census Bureau, 25 June 2026, https://www.census.gov/programs-surveys/popest/data/data-sets.html. Invokely, https://invokely.ai/en/median-age-july-1-us-counties/trinity-county-california. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Census Bureau. 2026. Population Estimates Program, county population by age and sex: median age (MEDIAN_AGE_TOT) on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage. Median age on 1 July (US county estimates), Trinity County, 2010 to 2025. Dataset. Accessed October 12, 2026. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Also distributed by Invokely, https://invokely.ai/en/median-age-july-1-us-counties/trinity-county-california.

Harvard

U.S. Census Bureau (2026) Population Estimates Program, county population by age and sex: median age (MEDIAN_AGE_TOT) on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage, Median age on 1 July (US county estimates), Trinity County, 2010 to 2025 [Dataset]. Available at: https://www.census.gov/programs-surveys/popest/data/data-sets.html, via Invokely: https://invokely.ai/en/median-age-july-1-us-counties/trinity-county-california (Accessed: 12 October 2026).

BibTeX
@misc{census_median_age_on_1_2025,
  author = {{U.S. Census Bureau}},
  title = {{Population Estimates Program, county population by age and sex: median age (MEDIAN\_AGE\_TOT) on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage: Median age on 1 July (US county estimates), Trinity County, 2010 to 2025}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www.census.gov/programs-surveys/popest/data/data-sets.html},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/en/median-age-july-1-us-counties/trinity-county-california. Publisher attribution: U.S. Census Bureau. Population Estimates Program, county population by age and sex: median age (MEDIAN\_AGE\_TOT) on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Retrieved 2026-10-12.},
}
RIS
TY  - DATA
AU  - U.S. Census Bureau
TI  - Population Estimates Program, county population by age and sex: median age (MEDIAN_AGE_TOT) on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage: Median age on 1 July (US county estimates), Trinity County, 2010 to 2025
PY  - 2026
DA  - 2026/06/25
PB  - U.S. Census Bureau
DB  - Invokely
UR  - https://www.census.gov/programs-surveys/popest/data/data-sets.html
L2  - https://invokely.ai/en/median-age-july-1-us-counties/trinity-county-california
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/en/median-age-july-1-us-counties/trinity-county-california.
N1  - Publisher attribution: U.S. Census Bureau. Population Estimates Program, county population by age and sex: median age (MEDIAN_AGE_TOT) on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Retrieved 2026-10-12.
ER  -
Embed this chart

Paste this code into a web page or a blog post. The chart shows the latest figures as they are published, with the source and a link back to this page.

Sites that read oEmbed links, such as WordPress, can show the chart when you paste the link to this page.

Use this data in your AI agent

Invokely serves this figure to AI assistants through MCP and to code through a REST API, with the source and citation attached. Ask your assistant:

What is the latest median age on 1 July (US county estimates) in Trinity County? Cite the source.
get_value {"indicator":"median_age_pep","place":"us-county-06105"}
GET https://invokely.ai/api/v1/value?indicator=median_age_pep&place=us-county-06105

Connect Claude, ChatGPT or Cursor in one step. The trial answers 25 calls a day without an account.

Questions

What is the median age on 1 July (US county estimates) in Trinity County?

Median age on 1 July (US county estimates) in Trinity County was 49.8 years in 2025, according to the U.S. Census Bureau. That is up 0.5 from 2024. That is the 6th highest of 58 counties in 2025.

Where does this figure come from?

U.S. Census Bureau. Population Estimates Program, county population by age and sex: median age (MEDIAN_AGE_TOT) on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage. Retrieved by Invokely on 2026-10-12.

What was the highest median age on 1 July (US county estimates) in Trinity County?

50.2 years in 2014, the highest value since 2010 in this series.

Related statistics for Trinity County

All statistics for Trinity County | Trinity County in figures