Ranking of California Counties By Percentage of Population with Welsh Ancestry in 2021
Updated on April 16, 2025.
Based on the US Census ACS-5Yrs estimates, in 2021, there were 150.42K people in California with Welsh ancestry (0.38% of California population). Among all California counties, Sierra County had the highest percentage of its population with Welsh ancestry (2.79%), followed by Inyo County (1.99%), and Trinity County (1.49%).
The chart and table below shows the top 10 counties with high percentage of its population having Welsh 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 Welsh Ancestry in 2021
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| Rank | County | Percentage of Pop. (%) |
|---|---|---|
| 1 | Sierra County | 2.79 |
| 2 | Inyo County | 1.99 |
| 3 | Trinity County | 1.49 |
| 4 | Tuolumne County | 1.35 |
| 5 | Plumas County | 1.20 |
| 6 | Calaveras County | 1.15 |
| 7 | Humboldt County | 1.11 |
| 8 | Lake County | 1.09 |
| 9 | Mono County | 1.06 |
| 10 | El Dorado County | 1.03 |
| 10 | Mariposa County | 1.03 |
| 11 | Placer County | 0.85 |
| 12 | San Luis Obispo County | 0.84 |
| 13 | Amador County | 0.81 |
| 13 | Del Norte County | 0.81 |
| 13 | Lassen County | 0.81 |
| 14 | Santa Cruz County | 0.79 |
| 15 | Shasta County | 0.78 |
| 16 | Tehama County | 0.77 |
| 17 | Nevada County | 0.76 |
| 18 | Sonoma County | 0.72 |
| 19 | Mendocino County | 0.71 |
| 20 | Butte County | 0.69 |
| 21 | Marin County | 0.68 |
| 21 | Modoc County | 0.68 |
| 21 | Siskiyou County | 0.68 |
| 22 | Yuba County | 0.66 |
| 23 | Sutter County | 0.61 |
| 24 | Napa County | 0.60 |
| 25 | Santa Barbara County | 0.56 |
| 26 | Sacramento County | 0.54 |
| 27 | Contra Costa County | 0.52 |
| 27 | Ventura County | 0.52 |
| 28 | San Diego County | 0.48 |
| 29 | San Benito County | 0.46 |
| 30 | Orange County | 0.42 |
| 31 | Yolo County | 0.41 |
| 32 | San Francisco County | 0.40 |
| 32 | Stanislaus County | 0.40 |
| 33 | Kern County | 0.39 |
| 34 | Riverside County | 0.37 |
| 34 | Solano County | 0.37 |
| 35 | Madera County | 0.35 |
| 35 | Merced County | 0.35 |
| 35 | San Mateo County | 0.35 |
| 36 | Alameda County | 0.32 |
| 37 | Santa Clara County | 0.30 |
| 38 | Tulare County | 0.28 |
| 39 | Glenn County | 0.27 |
| 39 | Kings County | 0.27 |
| 39 | Monterey County | 0.27 |
| 40 | San Joaquin County | 0.26 |
| 41 | Fresno County | 0.25 |
| 41 | San Bernardino County | 0.25 |
| 42 | Colusa County | 0.24 |
| 43 | Los Angeles County | 0.22 |
| 44 | Imperial County | 0.10 |
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