Ranking of California Counties By Number of People and Percentage of Population With No Health Insurance Coverage in 2021 (ACS-5Yrs)
Based on the US Census ACS-5Yrs estimates, in 2021, the percentage of the California population without a health insurance coverage was 7.19% (i.e. 2,800,277 people). Percentagewise, among all California counties, Sierra County had the highest percentage of its population with no health insurance coverage (15.53%), followed by Mono County (12.54%), and Modoc County (12.00%).
In numerical terms, Los Angeles County had the highest number of people without a health insurance coverage (904,431), followed by San Diego County (237,716), and Orange County (224,932).
The charts below shows the top 10 counties by the number of people and percentage of the population without a health insurance coverage. The tables below shows the ranking for all California counties.
You can see similar information for other types of health insurance coverages.
You can also see similar information for other states.
| Rank | County | Percentage of Population (%) |
|---|---|---|
| 1 | Sierra County | 15.53 |
| 2 | Mono County | 12.54 |
| 3 | Modoc County | 12.00 |
| 4 | Trinity County | 10.46 |
| 5 | Santa Barbara County | 10.14 |
| 6 | Glenn County | 10.04 |
| 7 | Monterey County | 9.95 |
| 8 | Mendocino County | 9.71 |
| 9 | Los Angeles County | 9.09 |
| 10 | Merced County | 8.76 |
| 11 | San Bernardino County | 8.47 |
| 12 | Colusa County | 8.44 |
| 13 | Ventura County | 8.36 |
| 14 | Riverside County | 8.26 |
| 15 | Madera County | 8.20 |
| 16 | Kern County | 8.02 |
| 17 | Humboldt County | 7.68 |
| 18 | Tulare County | 7.67 |
| 19 | Kings County | 7.64 |
| 20 | San Diego County | 7.46 |
| 21 | Fresno County | 7.29 |
| 22 | Orange County | 7.10 |
| 23 | Inyo County | 7.08 |
| 24 | Yuba County | 7.07 |
| 25 | Shasta County | 6.82 |
| 26 | Lake County | 6.69 |
| 27 | Alpine County | 6.62 |
| 28 | Calaveras County | 6.60 |
| 28 | Imperial County | 6.60 |
| 28 | Sutter County | 6.60 |
| 29 | Siskiyou County | 6.52 |
| 30 | Tehama County | 6.50 |
| 30 | Tuolumne County | 6.50 |
| 31 | Mariposa County | 6.49 |
| 32 | San Benito County | 6.42 |
| 33 | Butte County | 6.39 |
| 34 | San Joaquin County | 6.38 |
| 35 | Stanislaus County | 6.05 |
| 36 | Napa County | 5.96 |
| 37 | San Luis Obispo County | 5.93 |
| 38 | Sonoma County | 5.90 |
| 39 | Lassen County | 5.77 |
| 40 | Nevada County | 5.48 |
| 41 | Sacramento County | 5.45 |
| 41 | Santa Cruz County | 5.45 |
| 42 | Del Norte County | 5.20 |
| 43 | Solano County | 4.76 |
| 44 | Contra Costa County | 4.73 |
| 45 | Amador County | 4.72 |
| 46 | Yolo County | 4.47 |
| 47 | Plumas County | 4.42 |
| 48 | Alameda County | 4.29 |
| 49 | Santa Clara County | 4.15 |
| 50 | El Dorado County | 4.10 |
| 51 | San Mateo County | 3.78 |
| 52 | San Francisco County | 3.61 |
| 53 | Marin County | 3.49 |
| 54 | Placer County | 3.42 |
| Rank | County | Number of People |
|---|---|---|
| 1 | Los Angeles County | 904431 |
| 2 | San Diego County | 237716 |
| 3 | Orange County | 224932 |
| 4 | Riverside County | 197139 |
| 5 | San Bernardino County | 179898 |
| 6 | Sacramento County | 84824 |
| 7 | Santa Clara County | 79687 |
| 8 | Fresno County | 72292 |
| 9 | Alameda County | 71358 |
| 10 | Kern County | 70413 |
| 11 | Ventura County | 70005 |
| 12 | Contra Costa County | 54756 |
| 13 | San Joaquin County | 48480 |
| 14 | Santa Barbara County | 44617 |
| 15 | Monterey County | 42096 |
| 16 | Tulare County | 35797 |
| 17 | Stanislaus County | 33169 |
| 18 | San Francisco County | 31130 |
| 19 | Sonoma County | 28827 |
| 20 | San Mateo County | 28663 |
| 21 | Merced County | 24212 |
| 22 | Solano County | 20892 |
| 23 | San Luis Obispo County | 16399 |
| 24 | Santa Cruz County | 14751 |
| 25 | Butte County | 13781 |
| 26 | Placer County | 13594 |
| 27 | Shasta County | 12299 |
| 28 | Madera County | 12145 |
| 29 | Imperial County | 11227 |
| 30 | Humboldt County | 10454 |
| 31 | Kings County | 10268 |
| 32 | Yolo County | 9611 |
| 33 | Marin County | 9030 |
| 34 | Mendocino County | 8803 |
| 35 | Napa County | 8180 |
| 36 | El Dorado County | 7768 |
| 37 | Sutter County | 6442 |
| 38 | Nevada County | 5534 |
| 39 | Yuba County | 5496 |
| 40 | Lake County | 4486 |
| 41 | Tehama County | 4212 |
| 42 | San Benito County | 4056 |
| 43 | Tuolumne County | 3392 |
| 44 | Calaveras County | 2967 |
| 45 | Siskiyou County | 2869 |
| 46 | Glenn County | 2851 |
| 47 | Colusa County | 1826 |
| 48 | Amador County | 1728 |
| 49 | Mono County | 1640 |
| 50 | Trinity County | 1636 |
| 51 | Lassen County | 1340 |
| 52 | Inyo County | 1306 |
| 53 | Del Norte County | 1299 |
| 54 | Mariposa County | 1107 |
| 55 | Modoc County | 1022 |
| 56 | Plumas County | 861 |
| 57 | Sierra County | 474 |
| 58 | Alpine County | 89 |