# Counties in California by uninsured rate, ages 19 to 34 (US, ACS), 2024

All 58 values come from U.S. Census Bureau for 2024, so the places are comparable.

- Indicator id: `uninsured_rate_19_34`
- Unit: %
- Definition: People aged 19 to 34 without health insurance coverage of any kind, as a percentage of the civilian noninstitutionalized population aged 19 to 34. United States: American Community Survey five-year estimate, where the period shown is the last year of the five-year span.
- Source: U.S. Census Bureau, American Community Survey 5-year estimates, table B27010: people aged 19 to 34 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 19 to 34, calculated with stored inputs (https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/acsdt5y2024-b27010.dat)
- Retrieved: 2026-10-12
- Citation: U.S. Census Bureau. American Community Survey 5-year estimates, table B27010: people aged 19 to 34 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 19 to 34, calculated with stored inputs. https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/acsdt5y2024-b27010.dat. Retrieved 2026-10-12.
- Web page: https://invokely.ai/rankings/uninsured-rate-ages-19-34/california-counties

| Rank | Place | % |
|---:|---|---:|
| 1 | Sierra County | 98.4 |
| 2 | Modoc County | 21.4 |
| 3 | Monterey County | 17.7 |
| 4 | Glenn County | 17.4 |
| 5 | Trinity County | 17 |
| 6 | Lake County | 14.6 |
| 7 | Inyo County | 13.7 |
| 8 | Colusa County | 13.2 |
| 8 | Tulare County | 13.2 |
| 10 | Mono County | 13.1 |
| 11 | Shasta County | 13 |
| 12 | Siskiyou County | 12.9 |
| 13 | Madera County | 12.7 |
| 14 | Los Angeles County | 12.6 |
| 15 | Santa Barbara County | 12.6 |
| 16 | Riverside County | 12.4 |
| 17 | Ventura County | 12.3 |
| 18 | Mendocino County | 12 |
| 19 | Merced County | 11.8 |
| 20 | Kern County | 11.6 |
| 21 | Mariposa County | 11.6 |
| 22 | San Bernardino County | 11.5 |
| 23 | Fresno County | 11.5 |
| 24 | San Joaquin County | 11.4 |
| 25 | Kings County | 11 |
| 26 | Butte County | 10.9 |
| 27 | Lassen County | 10.7 |
| 28 | Yuba County | 10.7 |
| 29 | Tuolumne County | 10.7 |
| 30 | Sutter County | 10.6 |
| 31 | Tehama County | 10.6 |
| 32 | Nevada County | 10.3 |
| 33 | San Diego County | 9.9 |
| 34 | Orange County | 9.9 |
| 35 | Napa County | 9.7 |
| 36 | Imperial County | 9.3 |
| 37 | Stanislaus County | 9.2 |
| 38 | San Luis Obispo County | 9.2 |
| 39 | Humboldt County | 9.1 |
| 40 | Alpine County | 9 |
| 41 | Contra Costa County | 8.9 |
| 42 | Calaveras County | 8.8 |
| 43 | San Benito County | 8.7 |
| 44 | Sacramento County | 8.6 |
| 45 | Solano County | 8.6 |
| 46 | Marin County | 8.5 |
| 46 | Sonoma County | 8.5 |
| 48 | Santa Cruz County | 8.1 |
| 49 | El Dorado County | 7.4 |
| 50 | Del Norte County | 6.9 |
| 50 | San Mateo County | 6.9 |
| 52 | Yolo County | 6.9 |
| 53 | Placer County | 6.7 |
| 54 | Alameda County | 6.7 |
| 55 | Amador County | 6.3 |
| 56 | Santa Clara County | 6.1 |
| 57 | Plumas County | 4.3 |
| 58 | San Francisco County | 4.2 |