Data / Rankings / Median age on 1 July (US county estimates) / Counties in California

Counties in California by median age on 1 July (US county estimates)

Sierra County had the highest median age on 1 July (US county estimates) of 58 counties in 2014, at 53.8 years. Tulare County had the lowest, at 30.7 years. The median was 37.7 years. Source: the U.S. Census Bureau.

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Highest53.8Sierra County
Lowest30.7Tulare County
Median37.758 counties

Map of counties, 2014

Alameda County: 36.9 yearsAlpine County: 50.1 yearsAmador County: 51.2 yearsButte County: 37.5 yearsCalaveras County: 51.3 yearsColusa County: 34.3 yearsContra Costa County: 39.1 yearsDel Norte County: 39.6 yearsEl Dorado County: 45.2 yearsFresno County: 31.8 yearsGlenn County: 36.8 yearsHumboldt County: 37.7 yearsImperial County: 32.7 yearsInyo County: 45.6 yearsKern County: 31.4 yearsKings County: 31.7 yearsLake County: 46 yearsLassen County: 37.7 yearsLos Angeles County: 35.8 yearsMadera County: 33.8 yearsMarin County: 45.3 yearsMariposa County: 51.7 yearsMendocino County: 42.4 yearsMerced County: 30.7 yearsModoc County: 48.1 yearsMono County: 38.1 yearsMonterey County: 33.6 yearsNapa County: 40.8 yearsNevada County: 49.1 yearsOrange County: 37.3 yearsPlacer County: 41.6 yearsPlumas County: 52.2 yearsRiverside County: 34.8 yearsSacramento County: 35.7 yearsSan Benito County: 35.4 yearsSan Bernardino County: 33 yearsSan Diego County: 35.3 yearsSan Francisco County: 38.4 yearsSan Joaquin County: 34 yearsSan Luis Obispo County: 39.7 yearsSan Mateo County: 39.5 yearsSanta Barbara County: 34.2 yearsSanta Clara County: 36.8 yearsSanta Cruz County: 37.9 yearsShasta County: 42.8 yearsSierra County: 53.8 yearsSiskiyou County: 48.1 yearsSolano County: 37.7 yearsSonoma County: 41.1 yearsStanislaus County: 34.2 yearsSutter County: 35.8 yearsTehama County: 40.7 yearsTrinity County: 50.2 yearsTulare County: 30.7 yearsTuolumne County: 48.7 yearsVentura County: 37.5 yearsYolo County: 31.8 yearsYuba County: 32.8 years
  • Under 34
  • 34 to 36
  • 36 to 38
  • 38 to 41
  • 41 to 48
  • 48 and over
years, 2014. 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. Boundaries: U.S. Census Bureau cartographic boundary files.

All counties, 2014

Sierra County: 53.8 yearsSierra County53.8Plumas County: 52.2 yearsPlumas County52.2Mariposa County: 51.7 yearsMariposa County51.7Calaveras County: 51.3 yearsCalaveras County51.3Amador County: 51.2 yearsAmador County51.2Trinity County: 50.2 yearsTrinity County50.2Alpine County: 50.1 yearsAlpine County50.1Nevada County: 49.1 yearsNevada County49.1Tuolumne County: 48.7 yearsTuolumne County48.7Modoc County: 48.1 yearsModoc County48.1Siskiyou County: 48.1 yearsSiskiyou County48.1Lake County: 46 yearsLake County46Inyo County: 45.6 yearsInyo County45.6Marin County: 45.3 yearsMarin County45.3El Dorado County: 45.2 yearsEl Dorado County45.2Shasta County: 42.8 yearsShasta County42.8Mendocino County: 42.4 yearsMendocino County42.4Placer County: 41.6 yearsPlacer County41.6Sonoma County: 41.1 yearsSonoma County41.1Napa County: 40.8 yearsNapa County40.8Tehama County: 40.7 yearsTehama County40.7San Luis Obispo County: 39.7 yearsSan Luis Obispo County39.7Del Norte County: 39.6 yearsDel Norte County39.6San Mateo County: 39.5 yearsSan Mateo County39.5Contra Costa County: 39.1 yearsContra Costa County39.1San Francisco County: 38.4 yearsSan Francisco County38.4Mono County: 38.1 yearsMono County38.1Santa Cruz County: 37.9 yearsSanta Cruz County37.9Humboldt County: 37.7 yearsHumboldt County37.7Lassen County: 37.7 yearsLassen County37.7Solano County: 37.7 yearsSolano County37.7Butte County: 37.5 yearsButte County37.5Ventura County: 37.5 yearsVentura County37.5Orange County: 37.3 yearsOrange County37.3Alameda County: 36.9 yearsAlameda County36.9Glenn County: 36.8 yearsGlenn County36.8Santa Clara County: 36.8 yearsSanta Clara County36.8Los Angeles County: 35.8 yearsLos Angeles County35.8Sutter County: 35.8 yearsSutter County35.8Sacramento County: 35.7 yearsSacramento County35.7San Benito County: 35.4 yearsSan Benito County35.4San Diego County: 35.3 yearsSan Diego County35.3Riverside County: 34.8 yearsRiverside County34.8Colusa County: 34.3 yearsColusa County34.3Santa Barbara County: 34.2 yearsSanta Barbara County34.2Stanislaus County: 34.2 yearsStanislaus County34.2San Joaquin County: 34 yearsSan Joaquin County34Madera County: 33.8 yearsMadera County33.8Monterey County: 33.6 yearsMonterey County33.6San Bernardino County: 33 yearsSan Bernardino County33Yuba County: 32.8 yearsYuba County32.8Imperial County: 32.7 yearsImperial County32.7Fresno County: 31.8 yearsFresno County31.8Yolo County: 31.8 yearsYolo County31.8Kings County: 31.7 yearsKings County31.7Kern County: 31.4 yearsKern County31.4Merced County: 30.7 yearsMerced County30.7Tulare County: 30.7 yearsTulare County30.7Sierra County: 53.8 yearsSierra County53.8Plumas County: 52.2 yearsPlumas County52.2Mariposa County: 51.7 yearsMariposa County51.7Calaveras County: 51.3 yearsCalaveras County51.3Amador County: 51.2 yearsAmador County51.2Trinity County: 50.2 yearsTrinity County50.2Alpine County: 50.1 yearsAlpine County50.1Nevada County: 49.1 yearsNevada County49.1Tuolumne County: 48.7 yearsTuolumne County48.7Modoc County: 48.1 yearsModoc County48.1Siskiyou County: 48.1 yearsSiskiyou County48.1Lake County: 46 yearsLake County46Inyo County: 45.6 yearsInyo County45.6Marin County: 45.3 yearsMarin County45.3El Dorado County: 45.2 yearsEl Dorado County45.2Shasta County: 42.8 yearsShasta County42.8Mendocino County: 42.4 yearsMendocino County42.4Placer County: 41.6 yearsPlacer County41.6Sonoma County: 41.1 yearsSonoma County41.1Napa County: 40.8 yearsNapa County40.8Tehama County: 40.7 yearsTehama County40.7San Luis Obispo County: 39.7 yearsSan Luis Obispo County39.7Del Norte County: 39.6 yearsDel Norte County39.6San Mateo County: 39.5 yearsSan Mateo County39.5Contra Costa County: 39.1 yearsContra Costa County39.1San Francisco County: 38.4 yearsSan Francisco County38.4Mono County: 38.1 yearsMono County38.1Santa Cruz County: 37.9 yearsSanta Cruz County37.9Humboldt County: 37.7 yearsHumboldt County37.7Lassen County: 37.7 yearsLassen County37.7Solano County: 37.7 yearsSolano County37.7Butte County: 37.5 yearsButte County37.5Ventura County: 37.5 yearsVentura County37.5Orange County: 37.3 yearsOrange County37.3Alameda County: 36.9 yearsAlameda County36.9Glenn County: 36.8 yearsGlenn County36.8Santa Clara County: 36.8 yearsSanta Clara County36.8Los Angeles County: 35.8 yearsLos Angeles County35.8Sutter County: 35.8 yearsSutter County35.8Sacramento County: 35.7 yearsSacramento County35.7San Benito County: 35.4 yearsSan Benito County35.4San Diego County: 35.3 yearsSan Diego County35.3Riverside County: 34.8 yearsRiverside County34.8Colusa County: 34.3 yearsColusa County34.3Santa Barbara County: 34.2 yearsSanta Barbara County34.2Stanislaus County: 34.2 yearsStanislaus County34.2San Joaquin County: 34 yearsSan Joaquin County34Madera County: 33.8 yearsMadera County33.8Monterey County: 33.6 yearsMonterey County33.6San Bernardino County: 33 yearsSan Bernardino County33Yuba County: 32.8 yearsYuba County32.8Imperial County: 32.7 yearsImperial County32.7Fresno County: 31.8 yearsFresno County31.8Yolo County: 31.8 yearsYolo County31.8Kings County: 31.7 yearsKings County31.7Kern County: 31.4 yearsKern County31.4Merced County: 30.7 yearsMerced County30.7Tulare County: 30.7 yearsTulare County30.7
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.

Full ranking

RankCounties2014
years		Change on 2013
1Sierra County53.8+0.7
2Plumas County52.2+0.6
3Mariposa County51.7+0.8
4Calaveras County51.3+0.5
5Amador County51.2+0.5
6Trinity County50.2+0.2
7Alpine County50.1+2.2
8Nevada County49.1+0.2
9Tuolumne County48.7+0.2
10Modoc County48.1+0.1
10Siskiyou County48.1+0.1
12Lake County46-0.1
13Inyo County45.6+0.2
14Marin County45.3+0.1
15El Dorado County45.2+0.3
16Shasta County42.8+0.2
17Mendocino County42.4+0.1
18Placer County41.6+0.3
19Sonoma County41.1+0.3
20Napa County40.8+0.3
21Tehama County40.7+0.1
22San Luis Obispo County39.70
23Del Norte County39.6+0.3
24San Mateo County39.50
25Contra Costa County39.1+0.1
26San Francisco County38.4-0.1
27Mono County38.1-0.2
28Santa Cruz County37.9+0.3
29Humboldt County37.7+0.1
29Lassen County37.7+0.2
29Solano County37.7+0.2
32Butte County37.5+0.1
32Ventura County37.5+0.3
34Orange County37.3+0.2
35Alameda County36.90
36Glenn County36.8+0.1
36Santa Clara County36.8+0.1
38Los Angeles County35.8+0.2
38Sutter County35.8+0.2
40Sacramento County35.7+0.2
41San Benito County35.4+0.3
42San Diego County35.3+0.2
43Riverside County34.8+0.3
44Colusa County34.3+0.2
45Santa Barbara County34.2+0.2
45Stanislaus County34.2+0.3
47San Joaquin County34+0.3
48Madera County33.8+0.3
49Monterey County33.6+0.3
50San Bernardino County33+0.3
51Yuba County32.8+0.2
52Imperial County32.7+0.2
53Fresno County31.8+0.3
53Yolo County31.8+0.5
55Kings County31.70
56Kern County31.4+0.2
57Merced County30.7+0.2
57Tulare County30.7+0.3

Other periods

About this ranking

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.

Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. Equal values share a rank.

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 (Counties in California by median age on 1 July (US county estimates), 2014) [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, Counties in California by median age on 1 July (US county estimates), 2014. U.S. Census Bureau, 25 June 2026, https://www.census.gov/programs-surveys/popest/data/data-sets.html. Invokely, https://invokely.ai/rankings/median-age-july-1-us-counties/california-counties?period=2014. 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. Counties in California by median age on 1 July (US county estimates), 2014. Dataset. Accessed October 12, 2026. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Also distributed by Invokely, https://invokely.ai/rankings/median-age-july-1-us-counties/california-counties?period=2014.

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, Counties in California by median age on 1 July (US county estimates), 2014 [Dataset]. Available at: https://www.census.gov/programs-surveys/popest/data/data-sets.html, via Invokely: https://invokely.ai/rankings/median-age-july-1-us-counties/california-counties?period=2014 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_california_by_2014,
  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: Counties in California by median age on 1 July (US county estimates), 2014}},
  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/rankings/median-age-july-1-us-counties/california-counties?period=2014. 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: Counties in California by median age on 1 July (US county estimates), 2014
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/rankings/median-age-july-1-us-counties/california-counties?period=2014
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/median-age-july-1-us-counties/california-counties?period=2014.
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  -
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Questions

Which county has the highest median age on 1 July (US county estimates)?

Sierra County, with 53.8 years in 2014, according to the U.S. Census Bureau.

Which county has the lowest median age on 1 July (US county estimates)?

Tulare County, with 30.7 years in 2014.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: 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.

Median age on 1 July (US county estimates): other rankings

Counties in California: more rankings