Data / Rankings / Population aged 65 and over / Counties in California

Counties in California by share of population aged 65 and over

Plumas County had the highest share of population aged 65 and over of 58 counties in 2022, at 31.7%. Kings County had the lowest, at 11.2%. The median was 18.1% and the figure for California was 16.2%. Source: the U.S. Census Bureau.

Highest31.7Plumas County
Lowest11.2Kings County
Median18.158 counties
California16.2History

All counties, 2022

CSVChart (SVG)

Plumas CountyPlumas County: 31.7 %31.7Sierra CountySierra County: 31.4 %31.4Mariposa CountyMariposa County: 29.6 %29.6Amador CountyAmador County: 29.2 %29.2Tuolumne CountyTuolumne County: 28.9 %28.9Calaveras CountyCalaveras County: 28.9 %28.9Nevada CountyNevada County: 28.8 %28.8Modoc CountyModoc County: 28.6 %28.6Siskiyou CountySiskiyou County: 28.2 %28.2Trinity CountyTrinity County: 26.9 %26.9Alpine CountyAlpine County: 26.2 %26.2Inyo CountyInyo County: 24.6 %24.6Mendocino CountyMendocino County: 24.4 %24.4Marin CountyMarin County: 24 %24El Dorado CountyEl Dorado County: 23.7 %23.7Lake CountyLake County: 23.5 %23.5San Luis Obispo CountySan Luis Obispo County: 23.3 %23.3Shasta CountyShasta County: 22.9 %22.9Sonoma CountySonoma County: 22.3 %22.3Napa CountyNapa County: 22 %22Placer CountyPlacer County: 21.2 %21.2Del Norte CountyDel Norte County: 20.9 %20.9Tehama CountyTehama County: 20.7 %20.7Humboldt CountyHumboldt County: 20.5 %20.5Santa Cruz CountySanta Cruz County: 19.9 %19.9Butte CountyButte County: 19.7 %19.7Ventura CountyVentura County: 18.2 %18.2San Mateo CountySan Mateo County: 18.2 %18.2San Francisco CountySan Francisco County: 18.1 %18.1Mono CountyMono County: 18 %18Glenn CountyGlenn County: 17.8 %17.8Solano CountySolano County: 17.8 %17.8Contra Costa CountyContra Costa County: 17.6 %17.6Santa Barbara CountySanta Barbara County: 17.6 %17.6Orange CountyOrange County: 16.7 %16.7Lassen CountyLassen County: 16.7 %16.7Sutter CountySutter County: 16.7 %16.7San Diego CountySan Diego County: 16.1 %16.1Colusa CountyColusa County: 16 %16Sacramento CountySacramento County: 15.9 %15.9Riverside CountyRiverside County: 15.9 %15.9Alameda CountyAlameda County: 15.6 %15.6Los Angeles CountyLos Angeles County: 15.5 %15.5Monterey CountyMonterey County: 15.2 %15.2Santa Clara CountySanta Clara County: 15 %15Madera CountyMadera County: 14.9 %14.9Stanislaus CountyStanislaus County: 14.7 %14.7Yolo CountyYolo County: 14.5 %14.5San Benito CountySan Benito County: 14.2 %14.2San Joaquin CountySan Joaquin County: 14.1 %14.1Imperial CountyImperial County: 14.1 %14.1Yuba CountyYuba County: 13.8 %13.8Fresno CountyFresno County: 13.6 %13.6San Bernardino CountySan Bernardino County: 13.3 %13.3Tulare CountyTulare County: 12.6 %12.6Kern CountyKern County: 12.3 %12.3Merced CountyMerced County: 12.1 %12.1Kings CountyKings County: 11.2 %11.2
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-09.

Full ranking

RankCounties2022 (%)Change on 2021
1Plumas County31.7+1.4 pts
2Sierra County31.4+0.6 pts
3Mariposa County29.6+0.7 pts
4Amador County29.2+0.4 pts
5Tuolumne County28.9+0.9 pts
6Calaveras County28.9+0.4 pts
7Nevada County28.8+0.6 pts
8Modoc County28.6+0.6 pts
9Siskiyou County28.2+0.7 pts
10Trinity County26.9+1 pts
11Alpine County26.2+1.2 pts
12Inyo County24.6+0.3 pts
13Mendocino County24.4+0.7 pts
14Marin County24+0.7 pts
15El Dorado County23.7+0.8 pts
16Lake County23.5+0.5 pts
17San Luis Obispo County23.3+0.5 pts
18Shasta County22.9+0.3 pts
19Sonoma County22.3+0.6 pts
20Napa County22+0.6 pts
21Placer County21.2+0.4 pts
22Del Norte County20.9+1.2 pts
23Tehama County20.7+0.2 pts
24Humboldt County20.5+0.4 pts
25Santa Cruz County19.9+0.2 pts
26Butte County19.7+0.1 pts
27Ventura County18.2+0.7 pts
28San Mateo County18.2+0.6 pts
29San Francisco County18.1+0.4 pts
30Mono County18+0.8 pts
31Glenn County17.8+0.2 pts
32Solano County17.8+0.6 pts
33Contra Costa County17.6+0.5 pts
34Santa Barbara County17.6+0.1 pts
35Orange County16.7+0.5 pts
36Lassen County16.7+1.4 pts
37Sutter County16.7+0.2 pts
38San Diego County16.1+0.4 pts
39Colusa County16+0.6 pts
40Sacramento County15.9+0.4 pts
41Riverside County15.9+0.3 pts
42Alameda County15.6+0.5 pts
43Los Angeles County15.5+0.5 pts
44Monterey County15.2+0.6 pts
45Santa Clara County15+0.4 pts
46Madera County14.9+0.2 pts
47Stanislaus County14.7+0.3 pts
48Yolo County14.5-0.2 pts
49San Benito County14.2+0.3 pts
50San Joaquin County14.1+0.3 pts
51Imperial County14.1+0.4 pts
52Yuba County13.8+0.2 pts
53Fresno County13.6+0.2 pts
54San Bernardino County13.3+0.3 pts
55Tulare County12.6+0.2 pts
56Kern County12.3+0.3 pts
57Merced County12.1+0.1 pts
58Kings County11.2+0.3 pts

Other periods

About this ranking

Residents aged 65 or over as a percentage of total population. Spain: 1 January, INE annual census. United States: 1 July, Census Bureau population estimates. World Bank figures for other countries and the World refer to mid-year.

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 (cc-est agesex): residents aged 65 and over as a percentage of the total, 1 July; states and the nation summed from counties. https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/counties/asrh/cc-est2025-agesex-all.csv. Retrieved 2026-10-09.

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:

Rank Counties in California by share of population aged 65 and over using official data, and cite the source.
rank_places {"indicator":"population_65_plus_share","level":"province","within":"California","limit":10}
GET https://invokely.ai/api/v1/rank?indicator=population_65_plus_share&level=province&within=California&limit=10

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Questions

Which county has the highest share of population aged 65 and over?

Plumas County, with 31.7% in 2022, according to the U.S. Census Bureau.

Which county has the lowest share of population aged 65 and over?

Kings County, with 11.2% in 2022.

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 (cc-est agesex): residents aged 65 and over as a percentage of the total, 1 July; states and the nation summed from counties. Retrieved 2026-10-09.

Population aged 65 and over: other rankings

Counties in California: more rankings