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.

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%–

02Mariposa County, CACA16,9180.6%–

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

04Ventura County, CACA830,8510.2%+0.1 pts

05Humboldt County, CACA131,6470.1%+0.1 pts

06San Francisco County, CACA826,0790.1%+0.0 pts

07San Bernardino County, CACA2,224,0910.1%+0.0 pts

08Los Angeles County, CACA9,694,9340.1%+0.0 pts

09Riverside County, CACA2,544,9160.1%+0.0 pts

10Contra Costa County, CACA1,170,0700.1%−0.0 pts

11Marin County, CACA253,6940.1%−0.0 pts

12Orange County, CACA3,149,5070.1%+0.0 pts

13Mendocino County, CACA88,1220.1%+0.0 pts

14Calaveras County, CACA46,6050.1%–

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

16Merced County, CACA297,2600.1%+0.1 pts

17Santa Cruz County, CACA258,8520.1%+0.0 pts

18Shasta County, CACA181,6480.1%+0.0 pts

19Tehama 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

22San Mateo County, CACA743,5680.1%+0.0 pts

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

24Santa Clara County, CACA1,914,3910.1%+0.0 pts

25Sacramento County, CACA1,618,4600.0%+0.0 pts

26Placer County, CACA442,0810.0%+0.0 pts

27San Luis Obispo County, CACA282,3670.0%+0.0 pts

28Fresno County, CACA1,035,4560.0%+0.0 pts

29Mono County, CACA12,5050.0%–

30Sonoma County, CACA486,4440.0%+0.0 pts

31Madera County, CACA167,9270.0%+0.0 pts

32Kern County, CACA927,0680.0%−0.0 pts

33Yolo County, CACA224,4100.0%+0.0 pts

34Yuba County, CACA88,6910.0%–

35Butte County, CACA209,2110.0%–

36Santa Barbara County, CACA442,0650.0%−0.0 pts

37Monterey County, CACA433,7290.0%−0.0 pts

38Napa County, CACA132,9490.0%−0.1 pts

39Tulare County, CACA485,1460.0%+0.0 pts

40San Joaquin County, CACA823,8150.0%−0.0 pts

41Siskiyou County, CACA42,0130.0%–

42Kings County, CACA154,3270.0%−0.0 pts

43Solano County, CACA455,3760.0%−0.0 pts

44Stanislaus County, CACA557,7190.0%−0.0 pts

SHOWING 1–44 OF 44

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UPDATED 2026-08-08 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES