Ranking of California Counties By Immigrant or Foreign-Born Population in 2021 (ACS-5Yrs)

Updated on September 27, 2024.

Based on the US Census ACS-5Yrs estimates, in 2021, among all California counties, Los Angeles had the highest immigrant or foreign-born population (3.35M), followed by Orange (937.21K), and Santa Clara (771.64K).

The chart below shows the top 10 counties, and the table below shows the ranking of all California counties.

You can see similar information for other states. You can also see the ranking for all counties in the United States.

Ranking of California Counties By Immigrant or Foreign-Born Population in 2021
Los Angeles
3.35M
Orange
937.21K
Santa Clara
771.64K
San Diego
749.11K
Alameda
551.15K
Riverside
518.94K
San Bernardino
448.44K
Sacramento
330.50K
San Francisco
295.40K
Contra Costa
289.97K
Ranking of California Counties By Immigrant or Foreign-Born Population in 2021
Rank
County
Immigrant Population
1 Los Angeles 3,353,972
2 Orange 937,214
3 Santa Clara 771,644
4 San Diego 749,110
5 Alameda 551,151
6 Riverside 518,941
7 San Bernardino 448,440
8 Sacramento 330,496
9 San Francisco 295,398
10 Contra Costa 289,971
11 San Mateo 267,704
12 Fresno 199,858
13 San Joaquin 179,920
14 Ventura 178,462
15 Kern 177,999
16 Monterey 127,488
17 Stanislaus 110,931
18 Tulare 102,060
19 Santa Barbara 100,250
20 Solano 89,017
21 Sonoma 80,398
22 Merced 72,635
23 Imperial 53,889
24 Marin 48,530
25 Santa Cruz 48,513
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