RANKING · 2010 CENSUS · 57 SHOWN OF 57

Highest Czech population share, California counties · 2010

California counties ranked by the share of all residents who are Czech ancestry (2010 American Community Survey). A concentration measure: Czech residents as a percentage of total population. This list covers the 57 counties in California that qualify, ranked against each other statewide. The median across all 57 is 0.3%.

Czech Americans: full group profile →

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SAME RANKING BYCities States Metros

RELATEDLargest American population Highest American population share Largest Arab population Highest Arab population share Largest Egyptian population Highest Egyptian population share

YEAR2010 2020 2024

RANKPLACESTATEPOPCZECH SHAREVS –

01Plumas County, CACA18,5831.2%–

02Sierra County, CACA3,0980.8%–

03Trinity County, CACA15,7200.8%–

04Modoc County, CACA8,4260.7%–

05Mendocino County, CACA88,1220.7%–

06Lassen County, CACA28,1170.6%–

07Marin County, CACA253,6940.6%–

08Inyo County, CACA18,1580.6%–

09San Luis Obispo County, CACA282,3670.6%–

10Butte County, CACA209,2110.5%–

11Del Norte County, CACA26,4100.5%–

12Siskiyou County, CACA42,0130.5%–

13Santa Cruz County, CACA258,8520.5%–

14San Benito County, CACA70,0820.5%–

15Nevada County, CACA101,9110.5%–

16Shasta County, CACA181,6480.4%–

17Sonoma County, CACA486,4440.4%–

18Calaveras County, CACA46,6050.4%–

19Placer County, CACA442,0810.4%–

20Lake County, CACA67,7720.4%–

21San Diego County, CACA3,282,2480.4%–

22San Francisco County, CACA826,0790.4%–

23Tuolumne County, CACA53,1600.4%–

24El Dorado County, CACA192,3230.4%–

25Ventura County, CACA830,8510.3%–

26Sutter County, CACA98,7870.3%–

27Humboldt County, CACA131,6470.3%–

28Contra Costa County, CACA1,170,0700.3%–

29Santa Barbara County, CACA442,0650.3%–

30Monterey County, CACA433,7290.3%–

31Orange County, CACA3,149,5070.3%–

32San Mateo County, CACA743,5680.3%–

33Sacramento County, CACA1,618,4600.3%–

34Yolo County, CACA224,4100.3%–

35Santa Clara County, CACA1,914,3910.3%–

36Alpine County, CACA1,0430.3%–

37Riverside County, CACA2,544,9160.2%–

38Napa County, CACA132,9490.2%–

39Tehama County, CACA64,6650.2%–

40Alameda County, CACA1,636,6300.2%–

41Fresno County, CACA1,035,4560.2%–

42Los Angeles County, CACA9,694,9340.2%–

43San Bernardino County, CACA2,224,0910.2%–

44Kern County, CACA927,0680.2%–

45Amador County, CACA41,8760.2%–

46San Joaquin County, CACA823,8150.1%–

47Glenn County, CACA28,1410.1%–

48Madera County, CACA167,9270.1%–

49Solano County, CACA455,3760.1%–

50Yuba County, CACA88,6910.1%–

51Tulare County, CACA485,1460.1%–

52Kings County, CACA154,3270.1%–

53Stanislaus County, CACA557,7190.1%–

54Colusa County, CACA21,8360.1%–

55Mono County, CACA12,5050.1%–

56Merced County, CACA297,2600.1%–

57Imperial County, CACA181,4110.0%–

SHOWING 1–57 OF 57

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU DECENNIAL CENSUS