Ranking of California Counties By Percentage of Population with Polish Ancestry in 2021
Updated on April 16, 2025.
Based on the US Census ACS-5Yrs estimates, in 2021, there were 452.02K people in California with Polish ancestry (1.15% of California population). Among all California counties, Mono County had the highest percentage of its population with Polish ancestry (4.61%), followed by Marin County (2.64%), and Sierra County (2.34%).
The chart and table below shows the top 10 counties with high percentage of its population having Polish 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 Polish Ancestry in 2021
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| Rank | County | Percentage of Pop. (%) |
|---|---|---|
| 1 | Mono County | 4.61 |
| 2 | Marin County | 2.64 |
| 3 | Sierra County | 2.34 |
| 4 | Mariposa County | 1.90 |
| 5 | Calaveras County | 1.88 |
| 6 | San Francisco County | 1.84 |
| 7 | Santa Cruz County | 1.79 |
| 7 | Tuolumne County | 1.79 |
| 8 | San Luis Obispo County | 1.75 |
| 9 | Sonoma County | 1.74 |
| 10 | Ventura County | 1.71 |
| 11 | Nevada County | 1.67 |
| 12 | San Diego County | 1.66 |
| 13 | El Dorado County | 1.59 |
| 14 | Placer County | 1.44 |
| 15 | Orange County | 1.41 |
| 16 | Shasta County | 1.39 |
| 17 | San Mateo County | 1.37 |
| 18 | Napa County | 1.34 |
| 19 | Contra Costa County | 1.33 |
| 20 | Santa Barbara County | 1.31 |
| 21 | Mendocino County | 1.30 |
| 22 | Inyo County | 1.23 |
| 23 | Humboldt County | 1.22 |
| 24 | Siskiyou County | 1.20 |
| 25 | Yolo County | 1.15 |
| 26 | Butte County | 1.14 |
| 27 | Sacramento County | 1.13 |
| 28 | Del Norte County | 1.08 |
| 28 | Los Angeles County | 1.08 |
| 29 | Alameda County | 1.07 |
| 29 | Santa Clara County | 1.07 |
| 30 | Amador County | 1.06 |
| 31 | Lake County | 1.04 |
| 31 | Lassen County | 1.04 |
| 32 | Modoc County | 1.03 |
| 33 | Yuba County | 0.99 |
| 34 | Riverside County | 0.96 |
| 35 | Glenn County | 0.85 |
| 35 | San Bernardino County | 0.85 |
| 36 | Solano County | 0.82 |
| 36 | Tehama County | 0.82 |
| 37 | Monterey County | 0.73 |
| 38 | San Benito County | 0.70 |
| 39 | Plumas County | 0.64 |
| 40 | San Joaquin County | 0.60 |
| 41 | Kern County | 0.58 |
| 41 | Sutter County | 0.58 |
| 42 | Madera County | 0.56 |
| 42 | Trinity County | 0.56 |
| 43 | Stanislaus County | 0.54 |
| 44 | Merced County | 0.47 |
| 45 | Colusa County | 0.41 |
| 46 | Alpine County | 0.37 |
| 47 | Fresno County | 0.36 |
| 48 | Kings County | 0.30 |
| 49 | Tulare County | 0.29 |
| 50 | Imperial County | 0.20 |
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