# Counties in California by current asthma in adults, local model estimate, 2023

All 58 values come from Centers for Disease Control and Prevention for 2023, so the places are comparable.

- Indicator id: `adult_asthma_rate_modelled`
- Unit: %
- Definition: Percentage of adults who have ever been told by a doctor, nurse or other health professional that they have asthma and say they still have it. Model-based estimate for adults aged 18 and over from CDC PLACES. Crude prevalence, not age-adjusted.
- Source: Centers for Disease Control and Prevention, PLACES: Local Data for Better Health, County Data (swc5-untb, fu4u-a9bh, h3ej-a9ec and later releases), current asthma in adults, crude prevalence (https://www.cdc.gov/places/)
- Publisher page: https://invokely.ai/en/publishers/cdc
- Retrieved: 2026-10-12
- Citation: Centers for Disease Control and Prevention (CDC). PLACES: Local Data for Better Health, County Data (swc5-untb, fu4u-a9bh, h3ej-a9ec and later releases), current asthma in adults, crude prevalence. https://www.cdc.gov/places/. Retrieved 2026-10-12. These data are available free from CDC. Use does not imply endorsement by CDC, ATSDR, HHS or the United States Government.
- Web page: https://invokely.ai/rankings/adult-asthma-rate-county-estimate/california-counties

| Rank | Place | % |
|---:|---|---:|
| 1 | Humboldt County | 11 |
| 1 | Siskiyou County | 11 |
| 1 | Trinity County | 11 |
| 4 | Del Norte County | 10.8 |
| 4 | Lake County | 10.8 |
| 4 | Modoc County | 10.8 |
| 4 | Shasta County | 10.8 |
| 8 | Tehama County | 10.7 |
| 9 | Mendocino County | 10.6 |
| 9 | Plumas County | 10.6 |
| 9 | Sierra County | 10.6 |
| 12 | Butte County | 10.5 |
| 13 | Madera County | 10.4 |
| 13 | Yuba County | 10.4 |
| 15 | Calaveras County | 10.3 |
| 15 | Kern County | 10.3 |
| 15 | Lassen County | 10.3 |
| 15 | Mariposa County | 10.3 |
| 15 | Tuolumne County | 10.3 |
| 20 | Alpine County | 10.2 |
| 20 | Inyo County | 10.2 |
| 20 | Nevada County | 10.2 |
| 20 | Sacramento County | 10.2 |
| 24 | Glenn County | 10.1 |
| 24 | Solano County | 10.1 |
| 26 | Amador County | 10 |
| 26 | Stanislaus County | 10 |
| 26 | Sutter County | 10 |
| 26 | Tulare County | 10 |
| 30 | Fresno County | 9.9 |
| 30 | Mono County | 9.9 |
| 30 | Placer County | 9.9 |
| 30 | San Bernardino County | 9.9 |
| 30 | San Luis Obispo County | 9.9 |
| 35 | Colusa County | 9.8 |
| 35 | El Dorado County | 9.8 |
| 35 | Kings County | 9.8 |
| 35 | Merced County | 9.8 |
| 35 | Santa Cruz County | 9.8 |
| 35 | Sonoma County | 9.8 |
| 35 | Yolo County | 9.8 |
| 42 | Santa Barbara County | 9.7 |
| 43 | Monterey County | 9.6 |
| 44 | Napa County | 9.5 |
| 44 | Riverside County | 9.5 |
| 44 | San Joaquin County | 9.5 |
| 44 | Ventura County | 9.5 |
| 48 | Contra Costa County | 9.4 |
| 48 | Marin County | 9.4 |
| 50 | Imperial County | 9.2 |
| 50 | San Benito County | 9.2 |
| 52 | Los Angeles County | 9.1 |
| 53 | Orange County | 9 |
| 54 | San Diego County | 8.9 |
| 55 | Alameda County | 8.8 |
| 56 | San Mateo County | 8.5 |
| 57 | San Francisco County | 8.4 |
| 58 | Santa Clara County | 7.9 |