RANKING · 2010 CENSUS · 39 SHOWN OF 39

Highest Costa Rican population share, California counties · 2010

California counties ranked by the share of all residents who are Costa Rican origin (2010 American Community Survey). A concentration measure: Costa Rican residents as a percentage of total population. This list covers the 39 counties in California that qualify, ranked against each other statewide. The median across all 39 is 0.0%.

Costa Rican Americans: full group profile →

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RELATEDLargest Mexican population Highest Mexican population share Largest Puerto Rican population Highest Puerto Rican population share Largest Cuban population Highest Cuban population share

YEAR2010 2020 2024

Highest Costa Rican population share by state

RANKPLACESTATEPOPCOSTA RICAN SHAREVS –

01Amador County, CACA41,8760.4%–

02Contra Costa County, CACA1,170,0700.1%–

03Marin County, CACA253,6940.1%–

04Napa County, CACA132,9490.1%–

05Los Angeles County, CACA9,694,9340.1%–

06San Benito County, CACA70,0820.1%–

07San Bernardino County, CACA2,224,0910.1%–

08San Francisco County, CACA826,0790.1%–

09Orange County, CACA3,149,5070.1%–

10Riverside County, CACA2,544,9160.1%–

11Ventura County, CACA830,8510.1%–

12Santa Cruz County, CACA258,8520.1%–

13San Joaquin County, CACA823,8150.0%–

14Santa Barbara County, CACA442,0650.0%–

15Kern County, CACA927,0680.0%–

16Alameda County, CACA1,636,6300.0%–

17San Diego County, CACA3,282,2480.0%–

18Sacramento County, CACA1,618,4600.0%–

19Mendocino County, CACA88,1220.0%–

20Placer County, CACA442,0810.0%–

21Santa Clara County, CACA1,914,3910.0%–

22San Mateo County, CACA743,5680.0%–

23San Luis Obispo County, CACA282,3670.0%–

24Sonoma County, CACA486,4440.0%–

25Kings County, CACA154,3270.0%–

26Shasta County, CACA181,6480.0%–

27Monterey County, CACA433,7290.0%–

28Humboldt County, CACA131,6470.0%–

29Lassen County, CACA28,1170.0%–

30Solano County, CACA455,3760.0%–

31Nevada County, CACA101,9110.0%–

32El Dorado County, CACA192,3230.0%–

33Fresno County, CACA1,035,4560.0%–

34Tehama County, CACA64,6650.0%–

35Madera County, CACA167,9270.0%–

36Merced County, CACA297,2600.0%–

37Yolo County, CACA224,4100.0%–

38Tulare County, CACA485,1460.0%–

39Stanislaus County, CACA557,7190.0%–

SHOWING 1–39 OF 39

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU DECENNIAL CENSUS