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 (2020 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. The median across all 58 is 0.2%.

Czech Americans: full group profile →

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SAME RANKING BYCities States Metros

YEAR2010 2020 2024

RANKPLACESTATEPOPCZECH SHAREVS 2010

01Mono County, CACA12,5050.9%+0.8 pts

02Alpine County, CACA1,0430.9%+0.6 pts

03Plumas County, CACA18,5830.6%−0.6 pts

04Santa Cruz County, CACA258,8520.5%0.0 pts

05Del Norte County, CACA26,4100.5%0.0 pts

06Nevada County, CACA101,9110.4%−0.1 pts

07San Luis Obispo County, CACA282,3670.4%−0.2 pts

08Humboldt County, CACA131,6470.4%0.0 pts

09Marin County, CACA253,6940.4%−0.2 pts

10Shasta County, CACA181,6480.4%−0.1 pts

11San Mateo County, CACA743,5680.3%0.0 pts

12Sonoma County, CACA486,4440.3%−0.1 pts

13San Francisco County, CACA826,0790.3%0.0 pts

14Mariposa County, CACA16,9180.3%–

15Butte County, CACA209,2110.3%−0.2 pts

16Trinity County, CACA15,7200.3%−0.5 pts

17Ventura County, CACA830,8510.3%−0.1 pts

18Sierra County, CACA3,0980.3%−0.6 pts

19Orange County, CACA3,149,5070.3%0.0 pts

20Santa Barbara County, CACA442,0650.3%−0.1 pts

21Napa County, CACA132,9490.3%0.0 pts

22Mendocino County, CACA88,1220.3%−0.4 pts

23Placer County, CACA442,0810.3%−0.2 pts

24Yolo County, CACA224,4100.3%0.0 pts

25San Diego County, CACA3,282,2480.2%−0.2 pts

26Contra Costa County, CACA1,170,0700.2%−0.1 pts

27Madera County, CACA167,9270.2%+0.1 pts

28Tuolumne County, CACA53,1600.2%−0.2 pts

29Inyo County, CACA18,1580.2%−0.4 pts

30El Dorado County, CACA192,3230.2%−0.1 pts

31Siskiyou County, CACA42,0130.2%−0.3 pts

32Riverside County, CACA2,544,9160.2%0.0 pts

33Sacramento County, CACA1,618,4600.2%−0.1 pts

34Alameda County, CACA1,636,6300.2%0.0 pts

35Monterey County, CACA433,7290.2%−0.1 pts

36Santa Clara County, CACA1,914,3910.2%−0.1 pts

37Yuba County, CACA88,6910.2%0.0 pts

38Sutter County, CACA98,7870.2%−0.2 pts

39Lake County, CACA67,7720.2%−0.2 pts

40Lassen County, CACA28,1170.2%−0.5 pts

41Modoc County, CACA8,4260.2%−0.6 pts

42Los Angeles County, CACA9,694,9340.2%0.0 pts

43Glenn County, CACA28,1410.1%0.0 pts

44Tehama County, CACA64,6650.1%−0.1 pts

45Fresno County, CACA1,035,4560.1%−0.1 pts

46San Joaquin County, CACA823,8150.1%0.0 pts

47Solano County, CACA455,3760.1%0.0 pts

48Kings County, CACA154,3270.1%0.0 pts

49Amador County, CACA41,8760.1%−0.1 pts

50San Bernardino County, CACA2,224,0910.1%−0.1 pts

51Kern County, CACA927,0680.1%−0.1 pts

52Tulare County, CACA485,1460.1%0.0 pts

53Stanislaus County, CACA557,7190.1%0.0 pts

54San Benito County, CACA70,0820.1%−0.4 pts

55Calaveras County, CACA46,6050.1%−0.4 pts

56Imperial County, CACA181,4110.0%0.0 pts

57Merced County, CACA297,2600.0%0.0 pts

58Colusa County, CACA21,8360.0%−0.1 pts

SHOWING 1–58 OF 58

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU DECENNIAL CENSUS