Ranking of California Counties By Percentage of Population with Czech Ancestry in 2021
Updated on April 16, 2025.
Based on the US Census ACS-5Yrs estimates, in 2021, there were 76.87K people in California with Czech ancestry (0.20% of California population). Among all California counties, Plumas County had the highest percentage of its population with Czech ancestry (0.88%), followed by Santa Cruz County (0.49%), and Mono County (0.41%).
The chart and table below shows the top 10 counties with high percentage of its population having Czech 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 Czech Ancestry in 2021
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| Rank | County | Percentage of Pop. (%) |
|---|---|---|
| 1 | Plumas County | 0.88 |
| 2 | Santa Cruz County | 0.49 |
| 3 | Mono County | 0.41 |
| 4 | Mariposa County | 0.40 |
| 5 | Marin County | 0.39 |
| 6 | San Luis Obispo County | 0.36 |
| 6 | Shasta County | 0.36 |
| 7 | Del Norte County | 0.34 |
| 7 | Tuolumne County | 0.34 |
| 8 | Nevada County | 0.33 |
| 8 | Sierra County | 0.33 |
| 8 | Sonoma County | 0.33 |
| 9 | San Francisco County | 0.32 |
| 10 | San Mateo County | 0.31 |
| 10 | Yolo County | 0.31 |
| 11 | Butte County | 0.29 |
| 11 | Napa County | 0.29 |
| 11 | Ventura County | 0.29 |
| 12 | Mendocino County | 0.28 |
| 13 | Humboldt County | 0.26 |
| 13 | Sutter County | 0.26 |
| 14 | Orange County | 0.25 |
| 14 | San Diego County | 0.25 |
| 15 | Contra Costa County | 0.24 |
| 16 | Placer County | 0.23 |
| 16 | Tehama County | 0.23 |
| 17 | El Dorado County | 0.22 |
| 17 | Santa Barbara County | 0.22 |
| 18 | Riverside County | 0.20 |
| 18 | Trinity County | 0.20 |
| 19 | Alameda County | 0.19 |
| 19 | Monterey County | 0.19 |
| 19 | Santa Clara County | 0.19 |
| 19 | Siskiyou County | 0.19 |
| 20 | Sacramento County | 0.18 |
| 21 | Yuba County | 0.17 |
| 22 | Amador County | 0.16 |
| 22 | Fresno County | 0.16 |
| 22 | Inyo County | 0.16 |
| 22 | Los Angeles County | 0.16 |
| 22 | San Benito County | 0.16 |
| 23 | Lake County | 0.13 |
| 23 | Madera County | 0.13 |
| 24 | Modoc County | 0.12 |
| 25 | Kern County | 0.11 |
| 25 | San Joaquin County | 0.11 |
| 26 | Solano County | 0.10 |
| 27 | Glenn County | 0.09 |
| 27 | Lassen County | 0.09 |
| 27 | San Bernardino County | 0.09 |
| 27 | Tulare County | 0.09 |
| 28 | Kings County | 0.08 |
| 29 | Stanislaus County | 0.07 |
| 30 | Calaveras County | 0.04 |
| 30 | Colusa County | 0.04 |
| 30 | Merced County | 0.04 |
| 31 | Imperial County | 0.03 |
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