RANKING · 2020 CENSUS · 39 SHOWN OF 39

Largest Costa Rican population, California counties · 2020

California counties ranked by the number of residents who are Costa Rican origin, from the 2020 American Community Survey detailed-origin tables. Each list covers the full eligible universe; download the complete data as CSV. This list covers the 39 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

Largest Costa Rican population by state

RANKPLACESTATEPOPCOSTA RICAN POPULATIONVS 2010

01Los Angeles County, CACA9,694,9349,844+3%

02Orange County, CACA3,149,5073,591+77%

03Riverside County, CACA2,544,9161,622+23%

04San Bernardino County, CACA2,224,0911,618+3%

05San Diego County, CACA3,282,2481,560+30%

06Santa Clara County, CACA1,914,391946+73%

07Sacramento County, CACA1,618,460877+61%

08Merced County, CACA297,260734+5546%

09Contra Costa County, CACA1,170,070715−42%

10Alameda County, CACA1,636,630691+16%

11Ventura County, CACA830,851611+27%

12San Francisco County, CACA826,079486−20%

13San Mateo County, CACA743,568423+109%

14Kern County, CACA927,068311−6%

15Marin County, CACA253,694253−7%

16Placer County, CACA442,081250+114%

17Fresno County, CACA1,035,456216+243%

18San Joaquin County, CACA823,815183−44%

19Sonoma County, CACA486,444182+44%

20Humboldt County, CACA131,647172+648%

21Santa Barbara County, CACA442,065166−7%

22San Luis Obispo County, CACA282,367156+117%

23Colusa County, CACA21,836151–

24Solano County, CACA455,376151+148%

25Yolo County, CACA224,410118+1211%

26Tulare County, CACA485,146115+667%

27Stanislaus County, CACA557,719103+587%

28El Dorado County, CACA192,32398+600%

29Santa Cruz County, CACA258,85249−64%

30Mendocino County, CACA88,12238+23%

31Calaveras County, CACA46,60538–

32Madera County, CACA167,92730+233%

33Shasta County, CACA181,64829−33%

34Mono County, CACA12,50527–

35Napa County, CACA132,94926−81%

36Monterey County, CACA433,72923−76%

37Siskiyou County, CACA42,0139–

38Tehama County, CACA64,6658+100%

39Butte County, CACA209,2117–

SHOWING 1–39 OF 39

Download CSV (full list, 39 rows)

UPDATED 2026-07-15 · DATA: US CENSUS BUREAU DECENNIAL CENSUS