Ranking of California Counties By Percentage of Black or African American Alone Population Aged 25 years and above with an Educational attainment of Less than High School Diploma in 2021 (ACS-5Yrs)
Based on the US Census ACS-5Yrs estimates, in 2021, the percentage of the California Black or African American Alone population (aged 25 years and above) who had an educational attainment of Less than High School Diploma was 9.60%. Among all California counties, Sierra County had the highest percentage of its Black or African American Alone population (aged 25 years and above) with an educational attainment of Less than High School Diploma (100.00%), followed by Del Norte County (41.81%), and Lassen County (41.80%).
The chart below shows the top 10 California counties, and the table below shows the ranking of all California counties.
You can see similar information for other educational attainments, and for other races and ethnicities.
You can also see similar information for other states and for the United States.
| Rank | County | Percentage of Population (Aged 25yrs+) (%) |
|---|---|---|
| 1 | Sierra County | 100.00 |
| 2 | Del Norte County | 41.81 |
| 3 | Lassen County | 41.80 |
| 4 | Amador County | 33.02 |
| 5 | Calaveras County | 31.99 |
| 6 | Humboldt County | 29.51 |
| 7 | Tuolumne County | 25.84 |
| 8 | Glenn County | 25.77 |
| 9 | Imperial County | 25.52 |
| 10 | Colusa County | 24.78 |
| 11 | Tehama County | 22.58 |
| 12 | Kings County | 19.92 |
| 13 | Shasta County | 18.86 |
| 14 | Trinity County | 18.75 |
| 15 | San Luis Obispo County | 17.81 |
| 16 | Madera County | 17.61 |
| 17 | Mariposa County | 17.39 |
| 18 | Siskiyou County | 17.20 |
| 19 | Kern County | 15.85 |
| 20 | Butte County | 15.66 |
| 21 | Marin County | 15.21 |
| 22 | Lake County | 14.39 |
| 23 | Sonoma County | 12.82 |
| 24 | Merced County | 12.68 |
| 25 | San Francisco County | 12.67 |
| 26 | El Dorado County | 12.42 |
| 27 | Monterey County | 12.02 |
| 28 | San Bernardino County | 11.66 |
| 29 | Santa Cruz County | 11.18 |
| 30 | Tulare County | 11.15 |
| 31 | Fresno County | 11.06 |
| 31 | Yuba County | 11.06 |
| 32 | Sutter County | 10.78 |
| 33 | San Joaquin County | 10.62 |
| 34 | Nevada County | 10.42 |
| 35 | Stanislaus County | 10.35 |
| 36 | Yolo County | 10.16 |
| 37 | Los Angeles County | 9.59 |
| 38 | Sacramento County | 8.99 |
| 39 | Alameda County | 8.39 |
| 39 | Napa County | 8.39 |
| 40 | San Diego County | 8.38 |
| 40 | Solano County | 8.38 |
| 41 | Inyo County | 7.79 |
| 42 | Orange County | 7.73 |
| 43 | Modoc County | 7.63 |
| 44 | Santa Clara County | 7.61 |
| 45 | Mendocino County | 7.33 |
| 46 | Contra Costa County | 7.16 |
| 46 | Riverside County | 7.16 |
| 47 | San Mateo County | 6.86 |
| 48 | Santa Barbara County | 6.80 |
| 49 | Plumas County | 5.96 |
| 50 | San Benito County | 5.93 |
| 51 | Ventura County | 5.51 |
| 52 | Placer County | 3.66 |
| 53 | Alpine County | 0.00 |
| 53 | Mono County | 0.00 |