# Counties in California by share of population aged 65 and over, 2025

All 58 values come from U.S. Census Bureau for 2025, so the places are comparable.

- Indicator id: `population_65_plus_share`
- Unit: %
- Definition: 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.
- Source: 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
- Citation: 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.
- Web page: https://invokely.ai/rankings/population-65-plus/california-counties
- CSV: https://invokely.ai/download/rankings/population-65-plus/california-counties.csv

| Rank | Place | % |
|---:|---|---:|
| 1 | Sierra County | 34.6 |
| 2 | Plumas County | 33.9 |
| 3 | Mariposa County | 31.1 |
| 4 | Calaveras County | 30.8 |
| 5 | Tuolumne County | 30.5 |
| 6 | Alpine County | 30.5 |
| 7 | Amador County | 30.5 |
| 8 | Nevada County | 30.4 |
| 9 | Siskiyou County | 30.2 |
| 10 | Modoc County | 30.1 |
| 11 | Trinity County | 30.1 |
| 12 | Inyo County | 26.4 |
| 13 | Mendocino County | 26.4 |
| 14 | El Dorado County | 26.2 |
| 15 | Marin County | 25.7 |
| 16 | Lake County | 25.1 |
| 17 | San Luis Obispo County | 24.9 |
| 18 | Sonoma County | 24.2 |
| 19 | Shasta County | 24.1 |
| 20 | Napa County | 23.7 |
| 21 | Humboldt County | 22.3 |
| 22 | Santa Cruz County | 22.2 |
| 23 | Placer County | 22.2 |
| 24 | Del Norte County | 22.2 |
| 25 | Tehama County | 22 |
| 26 | Butte County | 21 |
| 27 | Mono County | 20.2 |
| 28 | Ventura County | 20 |
| 29 | San Mateo County | 19.4 |
| 30 | Lassen County | 19.4 |
| 31 | Solano County | 19.3 |
| 32 | Contra Costa County | 19.1 |
| 33 | Santa Barbara County | 19 |
| 34 | San Francisco County | 18.8 |
| 35 | Glenn County | 18.8 |
| 36 | Orange County | 18.5 |
| 37 | Sutter County | 17.8 |
| 38 | San Diego County | 17.5 |
| 39 | Riverside County | 17.1 |
| 40 | Los Angeles County | 17.1 |
| 41 | Colusa County | 17.1 |
| 42 | Sacramento County | 17 |
| 43 | Alameda County | 17 |
| 44 | Monterey County | 16.5 |
| 45 | Santa Clara County | 16.3 |
| 46 | Yolo County | 15.6 |
| 47 | Stanislaus County | 15.6 |
| 48 | Madera County | 15.4 |
| 49 | San Benito County | 15.4 |
| 50 | Imperial County | 15.3 |
| 51 | San Joaquin County | 15 |
| 52 | San Bernardino County | 14.6 |
| 53 | Fresno County | 14.6 |
| 54 | Yuba County | 14.4 |
| 55 | Tulare County | 13.5 |
| 56 | Kern County | 13.4 |
| 57 | Merced County | 13.1 |
| 58 | Kings County | 12.4 |