RANKING · 2024 ACS · 55 SHOWN OF 55

Highest Czech population share, California counties

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 55 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

01Plumas County, CACA18,5830.8%–

02Santa Cruz County, CACA258,8520.5%–

03Marin County, CACA253,6940.5%–

04Mendocino County, CACA88,1220.4%–

05Del Norte County, CACA26,4100.4%–

06Butte County, CACA209,2110.4%–

07El Dorado County, CACA192,3230.4%–

08Sonoma County, CACA486,4440.4%–

09Inyo County, CACA18,1580.3%–

10Amador County, CACA41,8760.3%–

11Yolo County, CACA224,4100.3%–

12Ventura County, CACA830,8510.3%–

13Placer County, CACA442,0810.3%–

14San Benito County, CACA70,0820.3%–

15Lassen County, CACA28,1170.3%–

16Shasta County, CACA181,6480.3%–

17Siskiyou County, CACA42,0130.3%–

18San Luis Obispo County, CACA282,3670.3%–

19Tuolumne County, CACA53,1600.3%–

20Nevada County, CACA101,9110.3%–

21San Mateo County, CACA743,5680.3%–

22Contra Costa County, CACA1,170,0700.3%–

23San Francisco County, CACA826,0790.2%–

24San Diego County, CACA3,282,2480.2%–

25Napa County, CACA132,9490.2%–

26Orange County, CACA3,149,5070.2%–

27Modoc County, CACA8,4260.2%–

28Tehama County, CACA64,6650.2%–

29Santa Clara County, CACA1,914,3910.2%–

30Sutter County, CACA98,7870.2%–

31Sacramento County, CACA1,618,4600.2%–

32Humboldt County, CACA131,6470.2%–

33Lake County, CACA67,7720.2%–

34Alameda County, CACA1,636,6300.2%–

35Riverside County, CACA2,544,9160.2%–

36Santa Barbara County, CACA442,0650.2%–

37Monterey County, CACA433,7290.2%–

38Los Angeles County, CACA9,694,9340.1%–

39Fresno County, CACA1,035,4560.1%–

40Solano County, CACA455,3760.1%–

41Madera County, CACA167,9270.1%–

42Calaveras County, CACA46,6050.1%–

43San Joaquin County, CACA823,8150.1%–

44San Bernardino County, CACA2,224,0910.1%–

45Kern County, CACA927,0680.1%–

46Glenn County, CACA28,1410.1%–

47Yuba County, CACA88,6910.1%–

48Stanislaus County, CACA557,7190.1%–

49Mariposa County, CACA16,9180.1%–

50Kings County, CACA154,3270.1%–

51Imperial County, CACA181,4110.0%–

52Tulare County, CACA485,1460.0%–

53Colusa County, CACA21,8360.0%–

54Merced County, CACA297,2600.0%–

55Trinity County, CACA15,7200.0%–

SHOWING 1–55 OF 55

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