Ranking of California Counties By Percentage of Population with American Ancestry in 2021
Updated on April 16, 2025.
Based on the US Census ACS-5Yrs estimates, in 2021, there were 1.15M people in California with American ancestry (2.91% of California population). Among all California counties, Trinity County had the highest percentage of its population with American ancestry (11.08%), followed by Shasta County (7.45%), and Butte County (7.08%).
The chart and table below shows the top 10 counties with high percentage of its population having American ancestry.
You can see similar information for other states and for other ancestry groups in California.
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Related Topics: California ACS-5Yrs Estimates, 2021 Topic List.
Data Source: US Census Bureau.
Ranking of California Counties By Percentage of Population with American Ancestry in 2021
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| Rank | County | Percentage of Pop. (%) |
|---|---|---|
| 1 | Trinity County | 11.08 |
| 2 | Shasta County | 7.45 |
| 3 | Butte County | 7.08 |
| 4 | Tehama County | 7.04 |
| 5 | Modoc County | 6.01 |
| 6 | Ventura County | 5.04 |
| 7 | Orange County | 4.29 |
| 8 | Siskiyou County | 3.93 |
| 9 | Amador County | 3.71 |
| 9 | Glenn County | 3.71 |
| 10 | Alpine County | 3.65 |
| 11 | Lake County | 3.63 |
| 12 | Del Norte County | 3.62 |
| 12 | Kern County | 3.62 |
| 13 | El Dorado County | 3.58 |
| 14 | Mariposa County | 3.51 |
| 15 | Sutter County | 3.40 |
| 16 | Mono County | 3.37 |
| 16 | Placer County | 3.37 |
| 17 | Inyo County | 3.33 |
| 18 | Los Angeles County | 3.31 |
| 19 | San Luis Obispo County | 3.20 |
| 20 | Napa County | 3.03 |
| 21 | Humboldt County | 2.94 |
| 22 | Lassen County | 2.93 |
| 22 | Plumas County | 2.93 |
| 23 | Stanislaus County | 2.82 |
| 24 | Nevada County | 2.81 |
| 25 | Riverside County | 2.78 |
| 26 | San Diego County | 2.71 |
| 27 | Tuolumne County | 2.62 |
| 28 | Contra Costa County | 2.51 |
| 29 | Calaveras County | 2.49 |
| 29 | Sonoma County | 2.49 |
| 30 | San Mateo County | 2.47 |
| 31 | San Francisco County | 2.46 |
| 32 | Marin County | 2.40 |
| 33 | San Bernardino County | 2.37 |
| 34 | Sacramento County | 2.33 |
| 35 | Santa Cruz County | 2.29 |
| 36 | Yuba County | 2.28 |
| 37 | Santa Barbara County | 2.27 |
| 38 | Solano County | 2.22 |
| 39 | Colusa County | 2.06 |
| 40 | Yolo County | 2.03 |
| 41 | Alameda County | 2.02 |
| 42 | Madera County | 2.00 |
| 43 | Santa Clara County | 1.96 |
| 44 | Mendocino County | 1.90 |
| 44 | Tulare County | 1.90 |
| 45 | San Benito County | 1.82 |
| 46 | Merced County | 1.62 |
| 47 | Monterey County | 1.52 |
| 48 | San Joaquin County | 1.51 |
| 49 | Fresno County | 1.46 |
| 49 | Sierra County | 1.46 |
| 50 | Imperial County | 1.37 |
| 51 | Kings County | 1.23 |
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