RANKING · 2024 ACS · 44 SHOWN OF 44

Highest Costa Rican population share, California counties

California counties ranked by the share of all residents who are Costa Rican origin (2024 American Community Survey). A concentration measure: Costa Rican residents as a percentage of total population. This list covers the 44 counties in California that qualify, ranked against each other statewide. The median across all 44 is 0.1%. Biggest climber in the top 100 since 2020: Santa Cruz County, CA, up 18 places to #17.

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SAME RANKING BYCities States Metros

YEAR2010 2020 2024

Highest Costa Rican population share by state

RANKPLACESTATEPOPCOSTA RICAN SHAREVS 2010

01Colusa County, CACA21,8360.7%–

02Mariposa County, CACA16,9180.6%–

03San Benito County, CACA70,0820.2%+0.1 pts

04▲6Ventura County, CACA830,8510.2%+0.1 pts

05▼1Humboldt County, CACA131,6470.1%+0.1 pts

06▲9San Francisco County, CACA826,0790.1%0.0 pts

07▲2San Bernardino County, CACA2,224,0910.1%0.0 pts

08▼2Los Angeles County, CACA9,694,9340.1%0.0 pts

09▲2Riverside County, CACA2,544,9160.1%0.0 pts

10▲3Contra Costa County, CACA1,170,0700.1%0.0 pts

11▼4Marin County, CACA253,6940.1%0.0 pts

12▼7Orange County, CACA3,149,5070.1%0.0 pts

13▲9Mendocino County, CACA88,1220.1%0.0 pts

14▼6Calaveras County, CACA46,6050.1%–

15▲4El Dorado County, CACA192,3230.1%+0.1 pts

16▼14Merced County, CACA297,2600.1%+0.1 pts

17▲18Santa Cruz County, CACA258,8520.1%0.0 pts

18▲18Shasta County, CACA181,6480.1%0.0 pts

19▲18Tehama County, CACA64,6650.1%+0.1 pts

20Lassen County, CACA28,1170.1%0.0 pts

21San Diego County, CACA3,282,2480.1%0.0 pts

22▼6San Mateo County, CACA743,5680.1%0.0 pts

23Alameda County, CACA1,636,6300.1%0.0 pts

24▼4Santa Clara County, CACA1,914,3910.1%0.0 pts

25▼11Sacramento County, CACA1,618,4600.0%0.0 pts

26▼14Placer County, CACA442,0810.0%0.0 pts

27▼10San Luis Obispo County, CACA282,3670.0%0.0 pts

28▲2Fresno County, CACA1,035,4560.0%0.0 pts

29▼26Mono County, CACA12,5050.0%–

30▼5Sonoma County, CACA486,4440.0%0.0 pts

31▲1Madera County, CACA167,9270.0%0.0 pts

32▼6Kern County, CACA927,0680.0%0.0 pts

33▼15Yolo County, CACA224,4100.0%0.0 pts

34Yuba County, CACA88,6910.0%–

35▲4Butte County, CACA209,2110.0%–

36▼12Santa Barbara County, CACA442,0650.0%0.0 pts

37▲1Monterey County, CACA433,7290.0%0.0 pts

38▼4Napa County, CACA132,9490.0%−0.1 pts

39▼11Tulare County, CACA485,1460.0%0.0 pts

40▼11San Joaquin County, CACA823,8150.0%0.0 pts

41▼10Siskiyou County, CACA42,0130.0%–

42Kings County, CACA154,3270.0%0.0 pts

43▼16Solano County, CACA455,3760.0%0.0 pts

44▼11Stanislaus County, CACA557,7190.0%0.0 pts

SHOWING 1–44 OF 44

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES