RANKING · 2020 CENSUS · 58 SHOWN OF 58

Highest Czech population share, California counties · 2020

California counties ranked by the share of all residents who are Czech ancestry (2023 American Community Survey). A concentration measure: Czech residents as a percentage of total population. This list covers the 58 counties in California that qualify, ranked against each other statewide.

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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 2000

01Mono County, CACA12,5050.9%–

02Alpine County, CACA1,0430.9%–

03Plumas County, CACA18,5830.6%–

04Santa Cruz County, CACA258,8520.5%–

05Del Norte County, CACA26,4100.5%–

06Nevada County, CACA101,9110.4%–

07San Luis Obispo County, CACA282,3670.4%–

08Humboldt County, CACA131,6470.4%–

09Marin County, CACA253,6940.4%–

10Shasta County, CACA181,6480.4%–

11San Mateo County, CACA743,5680.3%–

12Sonoma County, CACA486,4440.3%–

13San Francisco County, CACA826,0790.3%–

14Mariposa County, CACA16,9180.3%–

15Butte County, CACA209,2110.3%–

16Trinity County, CACA15,7200.3%–

17Ventura County, CACA830,8510.3%–

18Sierra County, CACA3,0980.3%–

19Orange County, CACA3,149,5070.3%–

20Santa Barbara County, CACA442,0650.3%–

21Napa County, CACA132,9490.3%–

22Mendocino County, CACA88,1220.3%–

23Placer County, CACA442,0810.3%–

24Yolo County, CACA224,4100.3%–

25San Diego County, CACA3,282,2480.2%–

26Contra Costa County, CACA1,170,0700.2%–

27Madera County, CACA167,9270.2%–

28Tuolumne County, CACA53,1600.2%–

29Inyo County, CACA18,1580.2%–

30El Dorado County, CACA192,3230.2%–

31Siskiyou County, CACA42,0130.2%–

32Riverside County, CACA2,544,9160.2%–

33Sacramento County, CACA1,618,4600.2%–

34Alameda County, CACA1,636,6300.2%–

35Monterey County, CACA433,7290.2%–

36Santa Clara County, CACA1,914,3910.2%–

37Yuba County, CACA88,6910.2%–

38Sutter County, CACA98,7870.2%–

39Lake County, CACA67,7720.2%–

40Lassen County, CACA28,1170.2%–

41Modoc County, CACA8,4260.2%–

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

43Glenn County, CACA28,1410.1%–

44Tehama County, CACA64,6650.1%–

45Fresno County, CACA1,035,4560.1%–

46San Joaquin County, CACA823,8150.1%–

47Solano County, CACA455,3760.1%–

48Kings County, CACA154,3270.1%–

49Amador County, CACA41,8760.1%–

50San Bernardino County, CACA2,224,0910.1%–

51Kern County, CACA927,0680.1%–

52Tulare County, CACA485,1460.1%–

53Stanislaus County, CACA557,7190.1%–

54San Benito County, CACA70,0820.1%–

55Calaveras County, CACA46,6050.1%–

56Imperial County, CACA181,4110.0%–

57Merced County, CACA297,2600.0%–

58Colusa County, CACA21,8360.0%–

SHOWING 1–58 OF 58

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