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 (2023 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.

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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%–

02Merced County, CACA297,2600.3%–

03Mono County, CACA12,5050.2%–

04Humboldt County, CACA131,6470.1%–

05Orange County, CACA3,149,5070.1%–

06Los Angeles County, CACA9,694,9340.1%–

07Marin County, CACA253,6940.1%–

08Calaveras County, CACA46,6050.1%–

09San Bernardino County, CACA2,224,0910.1%–

10Ventura County, CACA830,8510.1%–

11Riverside County, CACA2,544,9160.1%–

12Placer County, CACA442,0810.1%–

13Contra Costa County, CACA1,170,0700.1%–

14Sacramento County, CACA1,618,4600.1%–

15San Francisco County, CACA826,0790.1%–

16San Mateo County, CACA743,5680.1%–

17San Luis Obispo County, CACA282,3670.1%–

18Yolo County, CACA224,4100.1%–

19El Dorado County, CACA192,3230.1%–

20Santa Clara County, CACA1,914,3910.0%–

21San Diego County, CACA3,282,2480.0%–

22Mendocino County, CACA88,1220.0%–

23Alameda County, CACA1,636,6300.0%–

24Santa Barbara County, CACA442,0650.0%–

25Sonoma County, CACA486,4440.0%–

26Kern County, CACA927,0680.0%–

27Solano County, CACA455,3760.0%–

28Tulare County, CACA485,1460.0%–

29San Joaquin County, CACA823,8150.0%–

30Fresno County, CACA1,035,4560.0%–

31Siskiyou County, CACA42,0130.0%–

32Madera County, CACA167,9270.0%–

33Stanislaus County, CACA557,7190.0%–

34Napa County, CACA132,9490.0%–

35Santa Cruz County, CACA258,8520.0%–

36Shasta County, CACA181,6480.0%–

37Tehama County, CACA64,6650.0%–

38Monterey County, CACA433,7290.0%–

39Butte County, CACA209,2110.0%–

SHOWING 1–39 OF 39

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