# Counties in California by uninsured rate, ages 18 to 64 (US model-based estimate), 2024

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

- Indicator id: `uninsured_rate_18_64`
- Unit: %
- Definition: People aged 18 to 64 without health insurance coverage of any kind, as a percentage of all people aged 18 to 64. United States: Census Bureau Small Area Health Insurance Estimates (SAHIE) for states and counties, all races, both sexes and all income levels.
- Source: U.S. Census Bureau, Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties (https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2024-csv.zip)
- Publisher page: https://invokely.ai/en/publishers/us-census-bureau
- Retrieved: 2026-10-12
- Citation: U.S. Census Bureau. Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties. https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2024-csv.zip. Retrieved 2026-10-12.
- Web page: https://invokely.ai/rankings/uninsured-rate-ages-18-64/california-counties

| Rank | Place | % |
|---:|---|---:|
| 1 | Madera County | 12.2 |
| 2 | Monterey County | 11.3 |
| 2 | Tulare County | 11.3 |
| 4 | Colusa County | 11.2 |
| 5 | Merced County | 10.9 |
| 6 | Kern County | 10.7 |
| 7 | Santa Barbara County | 10.5 |
| 8 | Imperial County | 10.2 |
| 9 | Mendocino County | 10.1 |
| 10 | Kings County | 10 |
| 10 | Los Angeles County | 10 |
| 10 | San Bernardino County | 10 |
| 13 | Glenn County | 9.7 |
| 13 | Riverside County | 9.7 |
| 13 | Sutter County | 9.7 |
| 16 | Fresno County | 9.3 |
| 16 | San Joaquin County | 9.3 |
| 18 | Mono County | 9 |
| 19 | Lake County | 8.9 |
| 20 | Tehama County | 8.7 |
| 21 | Ventura County | 8.4 |
| 22 | Stanislaus County | 8.3 |
| 23 | Napa County | 8 |
| 24 | Orange County | 7.9 |
| 25 | Modoc County | 7.7 |
| 25 | Siskiyou County | 7.7 |
| 27 | Mariposa County | 7.6 |
| 28 | San Diego County | 7.5 |
| 29 | Del Norte County | 7.4 |
| 29 | Yuba County | 7.4 |
| 31 | Butte County | 7.3 |
| 32 | Shasta County | 7.2 |
| 33 | San Benito County | 7.1 |
| 33 | Santa Cruz County | 7.1 |
| 33 | Sonoma County | 7.1 |
| 36 | Humboldt County | 7 |
| 36 | Lassen County | 7 |
| 38 | Inyo County | 6.9 |
| 39 | San Luis Obispo County | 6.7 |
| 40 | Nevada County | 6.6 |
| 40 | Sacramento County | 6.6 |
| 42 | Sierra County | 6.5 |
| 43 | Calaveras County | 6.2 |
| 43 | Solano County | 6.2 |
| 43 | Yolo County | 6.2 |
| 46 | Trinity County | 6.1 |
| 47 | Amador County | 6 |
| 47 | Contra Costa County | 6 |
| 49 | Plumas County | 5.9 |
| 50 | Marin County | 5.7 |
| 50 | Tuolumne County | 5.7 |
| 52 | Alameda County | 5.3 |
| 53 | El Dorado County | 5.1 |
| 53 | San Mateo County | 5.1 |
| 53 | Santa Clara County | 5.1 |
| 56 | Alpine County | 4.6 |
| 57 | Placer County | 4.5 |
| 58 | San Francisco County | 4.3 |