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 (2023 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.

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SAME RANKING BYCities States Metros

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 2000

01Colusa County, CACA21,8360.7%–

02Mariposa County, CACA16,9180.6%–

03San Benito County, CACA70,0820.2%–

04Ventura County, CACA830,8510.2%–

05Humboldt County, CACA131,6470.1%–

06San Francisco County, CACA826,0790.1%–

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

08Los Angeles County, CACA9,694,9340.1%–

09Riverside County, CACA2,544,9160.1%–

10Contra Costa County, CACA1,170,0700.1%–

11Marin County, CACA253,6940.1%–

12Orange County, CACA3,149,5070.1%–

13Mendocino County, CACA88,1220.1%–

14Calaveras County, CACA46,6050.1%–

15El Dorado County, CACA192,3230.1%–

16Merced County, CACA297,2600.1%–

17Santa Cruz County, CACA258,8520.1%–

18Shasta County, CACA181,6480.1%–

19Tehama County, CACA64,6650.1%–

20Lassen County, CACA28,1170.1%–

21San Diego County, CACA3,282,2480.1%–

22San Mateo County, CACA743,5680.1%–

23Alameda County, CACA1,636,6300.1%–

24Santa Clara County, CACA1,914,3910.1%–

25Sacramento County, CACA1,618,4600.0%–

26Placer County, CACA442,0810.0%–

27San Luis Obispo County, CACA282,3670.0%–

28Fresno County, CACA1,035,4560.0%–

29Mono County, CACA12,5050.0%–

30Sonoma County, CACA486,4440.0%–

31Madera County, CACA167,9270.0%–

32Kern County, CACA927,0680.0%–

33Yolo County, CACA224,4100.0%–

34Yuba County, CACA88,6910.0%–

35Butte County, CACA209,2110.0%–

36Santa Barbara County, CACA442,0650.0%–

37Monterey County, CACA433,7290.0%–

38Napa County, CACA132,9490.0%–

39Tulare County, CACA485,1460.0%–

40San Joaquin County, CACA823,8150.0%–

41Siskiyou County, CACA42,0130.0%–

42Kings County, CACA154,3270.0%–

43Solano County, CACA455,3760.0%–

44Stanislaus County, CACA557,7190.0%–

SHOWING 1–44 OF 44

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UPDATED 2026-06-06 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES