Ranking of California Counties By Percentage of Population with Basque Ancestry in 2021
Updated on April 16, 2025.
Based on the US Census ACS-5Yrs estimates, in 2021, there were 18.87K people in California with Basque ancestry (0.05% of California population). Among all California counties, Sierra County had the highest percentage of its population with Basque ancestry (2.08%), followed by Modoc County (0.52%), and Lassen County (0.39%).
The chart and table below shows the top 10 counties with high percentage of its population having Basque 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 Basque Ancestry in 2021
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| Rank | County | Percentage of Pop. (%) |
|---|---|---|
| 1 | Sierra County | 2.08 |
| 2 | Modoc County | 0.52 |
| 3 | Lassen County | 0.39 |
| 4 | Humboldt County | 0.33 |
| 5 | Calaveras County | 0.20 |
| 6 | Madera County | 0.17 |
| 7 | Kern County | 0.15 |
| 7 | Sonoma County | 0.15 |
| 8 | Butte County | 0.11 |
| 8 | Fresno County | 0.11 |
| 8 | Napa County | 0.11 |
| 8 | San Luis Obispo County | 0.11 |
| 9 | Placer County | 0.10 |
| 9 | San Benito County | 0.10 |
| 10 | El Dorado County | 0.08 |
| 10 | Inyo County | 0.08 |
| 10 | Marin County | 0.08 |
| 10 | Shasta County | 0.08 |
| 10 | Tulare County | 0.08 |
| 10 | Yolo County | 0.08 |
| 11 | Merced County | 0.07 |
| 11 | San Mateo County | 0.07 |
| 11 | Sutter County | 0.07 |
| 11 | Ventura County | 0.07 |
| 12 | Mendocino County | 0.06 |
| 12 | Yuba County | 0.06 |
| 13 | Contra Costa County | 0.05 |
| 13 | Sacramento County | 0.05 |
| 13 | San Diego County | 0.05 |
| 13 | San Francisco County | 0.05 |
| 13 | San Joaquin County | 0.05 |
| 13 | Tuolumne County | 0.05 |
| 14 | Nevada County | 0.04 |
| 14 | Orange County | 0.04 |
| 14 | Siskiyou County | 0.04 |
| 14 | Solano County | 0.04 |
| 14 | Tehama County | 0.04 |
| 15 | Alameda County | 0.03 |
| 15 | Lake County | 0.03 |
| 15 | Riverside County | 0.03 |
| 15 | San Bernardino County | 0.03 |
| 15 | Santa Barbara County | 0.03 |
| 15 | Santa Clara County | 0.03 |
| 15 | Santa Cruz County | 0.03 |
| 15 | Stanislaus County | 0.03 |
| 16 | Imperial County | 0.02 |
| 16 | Kings County | 0.02 |
| 16 | Los Angeles County | 0.02 |
| 16 | Monterey County | 0.02 |