RANKING · 2020 CENSUS · 39 SHOWN OF 39

Highest Costa Rican population share, California counties · 2020

California counties ranked by the share of all residents who are Costa Rican origin (2020 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 2010

01Colusa County, CACA21,8360.7%–

02Merced County, CACA297,2600.3%+0.3 pts

03Mono County, CACA12,5050.2%–

04Humboldt County, CACA131,6470.1%+0.1 pts

05Orange County, CACA3,149,5070.1%0.0 pts

06Los Angeles County, CACA9,694,9340.1%0.0 pts

07Marin County, CACA253,6940.1%0.0 pts

08Calaveras County, CACA46,6050.1%–

09San Bernardino County, CACA2,224,0910.1%0.0 pts

10Ventura County, CACA830,8510.1%0.0 pts

11Riverside County, CACA2,544,9160.1%0.0 pts

12Placer County, CACA442,0810.1%0.0 pts

13Contra Costa County, CACA1,170,0700.1%−0.1 pts

14Sacramento County, CACA1,618,4600.1%0.0 pts

15San Francisco County, CACA826,0790.1%0.0 pts

16San Mateo County, CACA743,5680.1%0.0 pts

17San Luis Obispo County, CACA282,3670.1%0.0 pts

18Yolo County, CACA224,4100.1%0.0 pts

19El Dorado County, CACA192,3230.1%0.0 pts

20Santa Clara County, CACA1,914,3910.0%0.0 pts

21San Diego County, CACA3,282,2480.0%0.0 pts

22Mendocino County, CACA88,1220.0%0.0 pts

23Alameda County, CACA1,636,6300.0%0.0 pts

24Santa Barbara County, CACA442,0650.0%0.0 pts

25Sonoma County, CACA486,4440.0%0.0 pts

26Kern County, CACA927,0680.0%0.0 pts

27Solano County, CACA455,3760.0%0.0 pts

28Tulare County, CACA485,1460.0%0.0 pts

29San Joaquin County, CACA823,8150.0%0.0 pts

30Fresno County, CACA1,035,4560.0%0.0 pts

31Siskiyou County, CACA42,0130.0%–

32Madera County, CACA167,9270.0%0.0 pts

33Stanislaus County, CACA557,7190.0%0.0 pts

34Napa County, CACA132,9490.0%−0.1 pts

35Santa Cruz County, CACA258,8520.0%0.0 pts

36Shasta County, CACA181,6480.0%0.0 pts

37Tehama County, CACA64,6650.0%0.0 pts

38Monterey County, CACA433,7290.0%0.0 pts

39Butte County, CACA209,2110.0%–

SHOWING 1–39 OF 39

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