RANKING · 2024 ACS · 55 SHOWN OF 55

Largest Czech population, California counties

California counties ranked by the number of residents who are Czech ancestry, from the 2024 American Community Survey detailed-origin tables. Each list covers the full eligible universe; download the complete data as CSV. 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 POPULATIONVS 2010

01Los Angeles County, CACA9,694,93414,196−18%

02San Diego County, CACA3,282,2488,134−32%

03Orange County, CACA3,149,5077,001−24%

04Riverside County, CACA2,544,9164,083−19%

05Santa Clara County, CACA1,914,3913,671−22%

06Contra Costa County, CACA1,170,0702,920−13%

07Sacramento County, CACA1,618,4602,779−30%

08Alameda County, CACA1,636,6302,754−7%

09Ventura County, CACA830,8512,626−5%

10San Bernardino County, CACA2,224,0912,289−33%

11San Francisco County, CACA826,0792,058−31%

12San Mateo County, CACA743,5681,861−13%

13Sonoma County, CACA486,4441,804−10%

14Fresno County, CACA1,035,4561,433−11%

15Placer County, CACA442,0811,302−7%

16Santa Cruz County, CACA258,8521,290+3%

17Marin County, CACA253,6941,187−20%

18San Joaquin County, CACA823,8151,009+4%

19Kern County, CACA927,068880−35%

20Butte County, CACA209,211817−27%

21San Luis Obispo County, CACA282,367769−49%

22Santa Barbara County, CACA442,065729−46%

23El Dorado County, CACA192,323728+12%

24Yolo County, CACA224,410700+26%

25Monterey County, CACA433,729676−47%

26Solano County, CACA455,376607+6%

27Shasta County, CACA181,648529−30%

28Stanislaus County, CACA557,719391−26%

29Mendocino County, CACA88,122368−40%

30Napa County, CACA132,949308+4%

31Nevada County, CACA101,911261−45%

32Humboldt County, CACA131,647234−47%

33Madera County, CACA167,927216+4%

34Tulare County, CACA485,146208−61%

35San Benito County, CACA70,082205−22%

36Sutter County, CACA98,787180−43%

37Plumas County, CACA18,583150−39%

38Tuolumne County, CACA53,160147−30%

39Amador County, CACA41,876141+131%

40Tehama County, CACA64,665136+1%

41Siskiyou County, CACA42,013123−44%

42Lake County, CACA67,772116−55%

43Del Norte County, CACA26,410108−24%

44Kings County, CACA154,327105−34%

45Lassen County, CACA28,11789−60%

46Imperial County, CACA181,41187+21%

47Yuba County, CACA88,69179−18%

48Inyo County, CACA18,15865−40%

49Calaveras County, CACA46,60560−69%

50Merced County, CACA297,26046−71%

51Glenn County, CACA28,14127−33%

52Modoc County, CACA8,42618−74%

53Mariposa County, CACA16,91812–

54Colusa County, CACA21,8365−75%

55Trinity County, CACA15,7202−98%

SHOWING 1–55 OF 55

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UPDATED 2026-07-15 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES