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. The median across all 55 is 391. Biggest climber in the top 100 since 2020: San Benito County, CA, up 14 places to #35.

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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%

02▲1San Diego County, CACA3,282,2488,134−32%

03▼1Orange County, CACA3,149,5077,001−24%

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

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

06▲3Contra Costa County, CACA1,170,0702,920−13%

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

08▼2Alameda County, CACA1,636,6302,754−7%

09▲2Ventura County, CACA830,8512,626−5%

10▲2San Bernardino County, CACA2,224,0912,289−33%

11▼3San Francisco County, CACA826,0792,058−31%

12▼2San Mateo County, CACA743,5681,861−13%

13Sonoma County, CACA486,4441,804−10%

14▲1Fresno County, CACA1,035,4561,433−11%

15▲3Placer County, CACA442,0811,302−7%

16▼2Santa Cruz County, CACA258,8521,290+3%

17▲2Marin County, CACA253,6941,187−20%

18▲3San Joaquin County, CACA823,8151,009+4%

19▲3Kern County, CACA927,068880−35%

20▲3Butte County, CACA209,211817−27%

21▼4San Luis Obispo County, CACA282,367769−49%

22▼6Santa Barbara County, CACA442,065729−46%

23▲7El Dorado County, CACA192,323728+12%

24▲1Yolo County, CACA224,410700+26%

25▼5Monterey County, CACA433,729676−47%

26▲1Solano County, CACA455,376607+6%

27▼3Shasta County, CACA181,648529−30%

28Stanislaus County, CACA557,719391−26%

29▲5Mendocino County, CACA88,122368−40%

30▲2Napa County, CACA132,949308+4%

31▼2Nevada County, CACA101,911261−45%

32▼6Humboldt County, CACA131,647234−47%

33Madera County, CACA167,927216+4%

34▼3Tulare County, CACA485,146208−61%

35▲14San Benito County, CACA70,082205−22%

36▼1Sutter County, CACA98,787180−43%

37▲5Plumas County, CACA18,583150−39%

38▲2Tuolumne County, CACA53,160147−30%

39▲13Amador County, CACA41,876141+131%

40▲5Tehama County, CACA64,665136+1%

41▲3Siskiyou County, CACA42,013123−44%

42▲1Lake County, CACA67,772116−55%

43▼6Del Norte County, CACA26,410108−24%

44▼8Kings County, CACA154,327105−34%

45▲3Lassen County, CACA28,11789−60%

46Imperial County, CACA181,41187+21%

47▼9Yuba County, CACA88,69179−18%

48▲3Inyo County, CACA18,15865−40%

49▲5Calaveras County, CACA46,60560−69%

50▼9Merced County, CACA297,26046−71%

51▼1Glenn County, CACA28,14127−33%

52▲3Modoc County, CACA8,42618−74%

53▼6Mariposa County, CACA16,91812–

54▲3Colusa County, CACA21,8365−75%

55▼2Trinity County, CACA15,7202−98%

SHOWING 1–55 OF 55

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES