RANKING · 2020 CENSUS · 58 SHOWN OF 58

Largest Czech population, California counties · 2020

California counties ranked by the number of residents who are Czech ancestry, from the 2020 American Community Survey detailed-origin tables. Each list covers the full eligible universe; download the complete data as CSV. This list covers the 58 counties in California that qualify, ranked against each other statewide.

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 POPULATIONVS 2010

01Los Angeles County, CACA9,694,93415,856−8%

02Orange County, CACA3,149,5078,587−7%

03San Diego County, CACA3,282,2488,129−32%

04Riverside County, CACA2,544,9165,125+2%

05Santa Clara County, CACA1,914,3913,710−22%

06Alameda County, CACA1,636,6303,396+15%

07Sacramento County, CACA1,618,4603,149−21%

08San Francisco County, CACA826,0792,881−4%

09Contra Costa County, CACA1,170,0702,635−22%

10San Mateo County, CACA743,5682,553+20%

11Ventura County, CACA830,8512,355−15%

12San Bernardino County, CACA2,224,0911,954−43%

13Sonoma County, CACA486,4441,653−18%

14Santa Cruz County, CACA258,8521,369+9%

15Fresno County, CACA1,035,4561,263−22%

16Santa Barbara County, CACA442,0651,205−11%

17San Luis Obispo County, CACA282,3671,113−27%

18Placer County, CACA442,0811,014−28%

19Marin County, CACA253,694970−34%

20Monterey County, CACA433,729864−33%

21San Joaquin County, CACA823,815845−13%

22Kern County, CACA927,068804−40%

23Butte County, CACA209,211695−38%

24Shasta County, CACA181,648657−13%

25Yolo County, CACA224,410547−2%

26Humboldt County, CACA131,647509+14%

27Solano County, CACA455,376490−14%

28Stanislaus County, CACA557,719446−16%

29Nevada County, CACA101,911406−14%

30El Dorado County, CACA192,323405−38%

31Tulare County, CACA485,146391−26%

32Napa County, CACA132,949368+24%

33Madera County, CACA167,927355+71%

34Mendocino County, CACA88,122229−63%

35Sutter County, CACA98,787156−50%

36Kings County, CACA154,327153−4%

37Del Norte County, CACA26,410134−6%

38Yuba County, CACA88,691131+36%

39Mono County, CACA12,505128+967%

40Tuolumne County, CACA53,160119−44%

41Merced County, CACA297,260118−26%

42Plumas County, CACA18,583110−55%

43Lake County, CACA67,772104−60%

44Siskiyou County, CACA42,01392−58%

45Tehama County, CACA64,66588−34%

46Imperial County, CACA181,41178+8%

47Mariposa County, CACA16,91854–

48Lassen County, CACA28,11749−78%

49San Benito County, CACA70,08247−82%

50Glenn County, CACA28,14142+5%

51Inyo County, CACA18,15839−64%

52Amador County, CACA41,87638−38%

53Trinity County, CACA15,72036−67%

54Calaveras County, CACA46,60528−85%

55Modoc County, CACA8,42614−80%

56Alpine County, CACA1,04310+233%

57Colusa County, CACA21,8368−60%

58Sierra County, CACA3,0988−71%

SHOWING 1–58 OF 58

Download CSV (full list, 58 rows)

UPDATED 2026-07-15 · DATA: US CENSUS BUREAU DECENNIAL CENSUS