Ranking of California Counties By Voting-age Population Percentage from Census 2020
Updated on August 22, 2023.
According to the data from the US 2020 Census, as at April 2020, San Francisco County had the highest voting-age population percentage in California (87.04%), followed by Amador County (84.11%), and Alpine County (83.80%).
The chart below shows the top 10 counties with high voting-age population percentage, and the table below shows the ranking of all California counties based on the percentage of the population that were in the voting-age (18 years and over) group.
You can also see the ranking of counties by population for other states as well as for the whole United States.
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Related Topics: California Census 2020 Topic List.
Data Source: US Census Bureau, 2020 Census.
Ranking of California Counties By Voting-age Population Percentage from Census 2020
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| Rank | County | % of County Voting-age Population |
|---|---|---|
| 1 | San Francisco County | 87.04 |
| 2 | Amador County | 84.11 |
| 3 | Alpine County | 83.80 |
| 4 | Sierra County | 83.38 |
| 5 | Trinity County | 83.29 |
| 6 | Tuolumne County | 83.19 |
| 7 | Lassen County | 83.18 |
| 8 | Mariposa County | 82.82 |
| 9 | Plumas County | 82.57 |
| 10 | Nevada County | 82.48 |
| 11 | Calaveras County | 82.44 |
| 12 | San Luis Obispo County | 82.06 |
| 13 | Santa Cruz County | 81.14 |
| 14 | Siskiyou County | 80.75 |
| 15 | Humboldt County | 80.47 |
| 16 | Sonoma County | 80.42 |
| 17 | Napa County | 80.04 |
| 18 | Mono County | 79.99 |
| 19 | Marin County | 79.85 |
| 20 | Inyo County | 79.83 |
| 20 | San Mateo County | 79.83 |
| 21 | Alameda County | 79.56 |
| 22 | El Dorado County | 79.55 |
| 23 | Butte County | 79.54 |
| 24 | Del Norte County | 79.49 |
| 24 | Los Angeles County | 79.49 |
| 25 | Mendocino County | 79.42 |
| 26 | Modoc County | 79.37 |
| 27 | Lake County | 79.34 |
| 28 | Yolo County | 79.14 |
| 29 | San Diego County | 79.09 |
| 30 | Orange County | 79.06 |
| 31 | Santa Clara County | 79.00 |
| 32 | Shasta County | 78.79 |
| 33 | Santa Barbara County | 78.27 |
| 34 | Solano County | 78.23 |
| 35 | Ventura County | 77.76 |
| 36 | Contra Costa County | 77.42 |
| 37 | Placer County | 77.36 |
| 38 | Sacramento County | 76.80 |
| 39 | Tehama County | 75.73 |
| 40 | Riverside County | 75.41 |
| 41 | Sutter County | 74.86 |
| 42 | San Bernardino County | 74.67 |
| 43 | Monterey County | 74.66 |
| 44 | San Benito County | 74.62 |
| 45 | Glenn County | 74.23 |
| 46 | Stanislaus County | 73.78 |
| 47 | San Joaquin County | 73.58 |
| 48 | Imperial County | 73.57 |
| 49 | Kings County | 73.41 |
| 50 | Yuba County | 72.99 |
| 51 | Madera County | 72.46 |
| 52 | Fresno County | 72.40 |
| 53 | Colusa County | 72.04 |
| 54 | Kern County | 71.68 |
| 55 | Merced County | 71.20 |
| 56 | Tulare County | 69.98 |