Ranking of California Counties By Population with British Ancestry in 2021
Updated on April 16, 2025.
Based on the US Census ACS-5Yrs estimates, in 2021, there were 218.90K people in California with British ancestry. Among all California counties, Los Angeles County had the highest population with British ancestry (43.14K), followed by San Diego County (23.04K), and Orange County (19.67K).
The chart and table below shows the top 10 counties with high number of people with British 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 Population with British Ancestry in 2021
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| Rank | County | Population |
|---|---|---|
| 1 | Los Angeles County | 43140 |
| 2 | San Diego County | 23038 |
| 3 | Orange County | 19668 |
| 4 | Alameda County | 12068 |
| 5 | Santa Clara County | 11556 |
| 6 | Riverside County | 10624 |
| 7 | Sacramento County | 8540 |
| 8 | Contra Costa County | 8208 |
| 9 | San Francisco County | 7769 |
| 10 | San Bernardino County | 7057 |
| 11 | San Mateo County | 5965 |
| 12 | Ventura County | 5442 |
| 13 | Sonoma County | 5044 |
| 14 | Santa Barbara County | 4462 |
| 15 | Marin County | 4181 |
| 16 | Placer County | 3919 |
| 17 | Fresno County | 3521 |
| 18 | Santa Cruz County | 3422 |
| 19 | Kern County | 2768 |
| 20 | Solano County | 2463 |
| 21 | El Dorado County | 2461 |
| 22 | San Luis Obispo County | 2400 |
| 23 | Stanislaus County | 2038 |
| 24 | San Joaquin County | 1827 |
| 25 | Monterey County | 1805 |
| 26 | Shasta County | 1477 |
| 27 | Butte County | 1413 |
| 28 | Tulare County | 1344 |
| 29 | Yolo County | 1214 |
| 30 | Napa County | 1148 |
| 31 | Nevada County | 1135 |
| 32 | Humboldt County | 1060 |
| 33 | Yuba County | 715 |
| 34 | Merced County | 635 |
| 35 | Tuolumne County | 588 |
| 36 | Sutter County | 565 |
| 37 | Tehama County | 555 |
| 38 | Mendocino County | 483 |
| 39 | Madera County | 400 |
| 40 | Calaveras County | 366 |
| 41 | Amador County | 302 |
| 42 | Inyo County | 262 |
| 43 | San Benito County | 230 |
| 44 | Siskiyou County | 227 |
| 45 | Imperial County | 204 |
| 46 | Kings County | 196 |
| 47 | Lake County | 189 |
| 48 | Mariposa County | 167 |
| 49 | Lassen County | 121 |
| 50 | Del Norte County | 114 |
| 51 | Glenn County | 89 |
| 51 | Modoc County | 89 |
| 52 | Plumas County | 87 |
| 53 | Colusa County | 65 |
| 54 | Trinity County | 30 |
| 55 | Alpine County | 29 |
| 56 | Mono County | 17 |