# Counties in California by foreign-born share of the population, 2024

All 58 values come from U.S. Census Bureau for 2024, so the places are comparable.

- Indicator id: `foreign_born_share`
- Unit: %
- Definition: People who were not US citizens at birth, as a percentage of the total population. Includes naturalized citizens, lawful permanent residents, temporary migrants and unauthorized immigrants. United States: American Community Survey five-year estimate, where the period shown is the last year of the five-year span.
- Source: U.S. Census Bureau, American Community Survey 5-year estimates, table B05002: foreign-born population as a percentage of the total population, calculated with stored inputs (https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/acsdt5y2024-b05002.dat)
- Retrieved: 2026-10-09
- Citation: U.S. Census Bureau. American Community Survey 5-year estimates, table B05002: foreign-born population as a percentage of the total population, calculated with stored inputs. https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/acsdt5y2024-b05002.dat. Retrieved 2026-10-09.
- Web page: https://invokely.ai/rankings/foreign-born-population/california-counties
- CSV: https://invokely.ai/download/rankings/foreign-born-population/california-counties.csv

| Rank | Place | % |
|---:|---|---:|
| 1 | Santa Clara County | 41.5 |
| 2 | San Mateo County | 35.7 |
| 3 | Alameda County | 34.7 |
| 4 | San Francisco County | 34.1 |
| 5 | Los Angeles County | 33.4 |
| 6 | Imperial County | 31.6 |
| 7 | Orange County | 30.4 |
| 8 | Monterey County | 29.6 |
| 9 | Colusa County | 27.5 |
| 10 | Contra Costa County | 26.6 |
| 11 | Merced County | 25.6 |
| 12 | San Joaquin County | 25.2 |
| 13 | San Diego County | 22.8 |
| 14 | Sutter County | 22.7 |
| 15 | Sacramento County | 22.3 |
| 16 | Ventura County | 22.2 |
| 17 | Tulare County | 22.2 |
| 18 | Napa County | 22.2 |
| 19 | Santa Barbara County | 22.2 |
| 20 | Riverside County | 21.9 |
| 21 | San Bernardino County | 21.6 |
| 22 | Stanislaus County | 21 |
| 23 | Yolo County | 21 |
| 24 | Solano County | 20.8 |
| 25 | Kern County | 20.2 |
| 26 | Madera County | 20.1 |
| 27 | San Benito County | 20 |
| 28 | Fresno County | 20 |
| 29 | Marin County | 19.6 |
| 30 | Kings County | 19.2 |
| 31 | Glenn County | 18.6 |
| 32 | Santa Cruz County | 18 |
| 33 | Sonoma County | 16.8 |
| 34 | Mono County | 14.1 |
| 35 | Placer County | 12.7 |
| 36 | Mendocino County | 12.2 |
| 37 | Yuba County | 11.5 |
| 38 | Tehama County | 11.1 |
| 39 | Lake County | 9.9 |
| 40 | San Luis Obispo County | 9.9 |
| 41 | El Dorado County | 9.2 |
| 42 | Modoc County | 8.8 |
| 43 | Butte County | 8.6 |
| 44 | Mariposa County | 8.3 |
| 45 | Inyo County | 7.9 |
| 46 | Lassen County | 7 |
| 47 | Del Norte County | 6.8 |
| 48 | Nevada County | 6.4 |
| 49 | Humboldt County | 6.2 |
| 50 | Calaveras County | 6.1 |
| 51 | Siskiyou County | 5.8 |
| 52 | Amador County | 5.8 |
| 53 | Alpine County | 5.4 |
| 54 | Shasta County | 5 |
| 55 | Plumas County | 4.8 |
| 56 | Trinity County | 4.8 |
| 57 | Tuolumne County | 4.6 |
| 58 | Sierra County | 3.8 |