California Citizen Voting-age Population By County in 2017 (ACS-5Yrs)
Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2017, the citizen voting-age population for California was 24,970,110 and represented 64.05% of the total California population.
Among all California counties, Los Angeles had the highest citizen voting-age population (6.22M), followed by San Diego (2.21M), and Orange (2.02M).
In terms of percentages, Sierra had the highest percentage of its population being citizens of voting-age (83.88%), followed by Amador (82.23%), and Plumas (81.84%).
The chart and table below shows the citizen voting-age population of each county and the percentage of each county's population that were citizens of voting-age.
You can see similar information for other states and by state for the United States.
| County | Citizen Voting-age Population | % of County Population |
|---|---|---|
| Los Angeles | 6218280 | 61.53 |
| San Diego | 2207600 | 67.23 |
| Orange | 2021030 | 64.04 |
| Riverside | 1487320 | 63.16 |
| San Bernardino | 1332785 | 62.83 |
| Santa Clara | 1162020 | 60.80 |
| Alameda | 1056115 | 64.81 |
| Sacramento | 1013095 | 67.75 |
| Contra Costa | 743845 | 66.20 |
| San Francisco | 641255 | 74.20 |
| Fresno | 575985 | 59.28 |
| Ventura | 551510 | 65.05 |
| Kern | 512065 | 58.27 |
| San Mateo | 494910 | 64.83 |
| San Joaquin | 442155 | 61.06 |
| Sonoma | 354995 | 70.86 |
| Stanislaus | 331295 | 61.85 |
| Solano | 302380 | 69.52 |
| Santa Barbara | 281010 | 63.43 |
| Placer | 275790 | 73.55 |
| Tulare | 249665 | 54.42 |
| Monterey | 231735 | 53.50 |
| San Luis Obispo | 214960 | 76.74 |
| Santa Cruz | 189870 | 69.48 |
| Marin | 184740 | 70.83 |
| Butte | 172105 | 76.42 |
| Merced | 148455 | 55.52 |
| Yolo | 142945 | 67.24 |
| El Dorado | 139365 | 75.33 |
| Shasta | 135635 | 75.81 |
| Humboldt | 105235 | 77.67 |
| Imperial | 100555 | 55.88 |
| Napa | 95210 | 67.52 |
| Kings | 92010 | 61.26 |
| Madera | 90030 | 58.29 |
| Nevada | 78585 | 79.51 |
| Mendocino | 61820 | 70.66 |
| Sutter | 60185 | 62.97 |
| Yuba | 49480 | 66.29 |
| Lake | 48145 | 75.11 |
| Tehama | 45460 | 71.88 |
| Tuolumne | 43975 | 81.59 |
| San Benito | 36370 | 61.99 |
| Calaveras | 35785 | 79.43 |
| Siskiyou | 33670 | 77.35 |
| Amador | 30675 | 82.23 |
| Lassen | 25120 | 79.82 |
| Del Norte | 20805 | 75.82 |
| Glenn | 16755 | 59.98 |
| Plumas | 15325 | 81.84 |
| Mariposa | 14130 | 80.01 |
| Inyo | 13620 | 74.86 |
| Colusa | 12365 | 57.57 |
| Trinity | 10465 | 80.28 |
| Mono | 9285 | 66.04 |
| Modoc | 6785 | 75.26 |
| Sierra | 2420 | 83.88 |
| Alpine | 935 | 77.59 |
