California 2020 Census Total Voting-age Population (18yrs and over) By County
According to the data from the US 2020 decennial Census, as at April 2020, the total Voting-age population (18 years and over) of California was 30,827,105, which was 77.97% of the total California population.
Los Angeles County had the highest voting-age population (7,959,791), followed by San Diego County (2,608,768), and then Orange County (2,519,658). On the other hand, the 3 counties with low voting-age population were: Alpine County (1,009), Sierra County (2,698), and Modoc County (6,905).
You can also see this information for other states and also for the US by state.
Hover over or click on the counties to see the number and percentage of California population that lives in each county. The data can also be found in a table below. You can use the table to sort, filter, and explore the data further.
You can also see the voting-age population by county for the different racial groups as well as the different ethnicities in California.
County | Voting-age Population | % of California Pop. |
|---|---|---|
| Los Angeles | 7,959,791 | 25.82 |
| San Diego | 2,608,768 | 8.46 |
| Orange | 2,519,658 | 8.17 |
| Riverside | 1,823,505 | 5.92 |
| San Bernardino | 1,629,042 | 5.28 |
| Santa Clara | 1,529,717 | 4.96 |
| Alameda | 1,338,388 | 4.34 |
| Sacramento | 1,217,309 | 3.95 |
| Contra Costa | 902,672 | 2.93 |
| San Francisco | 760,738 | 2.47 |
| Fresno | 730,245 | 2.37 |
| Ventura | 656,198 | 2.13 |
| Kern | 651,739 | 2.11 |
| San Mateo | 610,236 | 1.98 |
| San Joaquin | 573,400 | 1.86 |
| Stanislaus | 407,908 | 1.32 |
| Sonoma | 393,152 | 1.27 |
| Solano | 354,770 | 1.15 |
| Santa Barbara | 350,805 | 1.14 |
| Tulare | 331,093 | 1.07 |
| Monterey | 327,777 | 1.06 |
| Placer | 313,117 | 1.02 |
| San Luis Obispo | 231,744 | 0.75 |
| Santa Cruz | 219,764 | 0.71 |
| Marin | 209,451 | 0.68 |
| California | 30,827,105 | 100 |