RANKING · 2010 CENSUS · 57 SHOWN OF 57

Highest Welsh population share, California counties · 2010

California counties ranked by the share of all residents who are Welsh ancestry (2010 American Community Survey). A concentration measure: Welsh residents as a percentage of total population. This list covers the 57 counties in California that qualify, ranked against each other statewide. The median across all 57 is 0.6%.

Welsh 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

RANKPLACESTATEPOPWELSH SHAREVS –

01Trinity County, CACA15,7202.8%–

02Alpine County, CACA1,0431.5%–

03Nevada County, CACA101,9111.5%–

04Modoc County, CACA8,4261.4%–

05Calaveras County, CACA46,6051.2%–

06Mendocino County, CACA88,1221.2%–

07Inyo County, CACA18,1581.1%–

08El Dorado County, CACA192,3231.1%–

09Lake County, CACA67,7721.1%–

10Siskiyou County, CACA42,0131.1%–

11San Luis Obispo County, CACA282,3671.0%–

12Shasta County, CACA181,6481.0%–

13Santa Cruz County, CACA258,8521.0%–

14Marin County, CACA253,6940.9%–

15Sonoma County, CACA486,4440.9%–

16Napa County, CACA132,9490.8%–

17Butte County, CACA209,2110.8%–

18Santa Barbara County, CACA442,0650.8%–

19Humboldt County, CACA131,6470.8%–

20Placer County, CACA442,0810.8%–

21Tuolumne County, CACA53,1600.8%–

22Mariposa County, CACA16,9180.8%–

23Plumas County, CACA18,5830.8%–

24Yolo County, CACA224,4100.7%–

25Lassen County, CACA28,1170.7%–

26Sacramento County, CACA1,618,4600.7%–

27Contra Costa County, CACA1,170,0700.7%–

28San Diego County, CACA3,282,2480.7%–

29Yuba County, CACA88,6910.6%–

30Amador County, CACA41,8760.6%–

31Ventura County, CACA830,8510.6%–

32Mono County, CACA12,5050.6%–

33Tehama County, CACA64,6650.6%–

34Glenn County, CACA28,1410.6%–

35Stanislaus County, CACA557,7190.6%–

36Orange County, CACA3,149,5070.5%–

37Madera County, CACA167,9270.5%–

38Monterey County, CACA433,7290.5%–

39Sutter County, CACA98,7870.5%–

40San Francisco County, CACA826,0790.5%–

41Riverside County, CACA2,544,9160.5%–

42Santa Clara County, CACA1,914,3910.5%–

43San Mateo County, CACA743,5680.5%–

44Solano County, CACA455,3760.5%–

45Fresno County, CACA1,035,4560.4%–

46Alameda County, CACA1,636,6300.4%–

47Del Norte County, CACA26,4100.4%–

48Kern County, CACA927,0680.4%–

49San Bernardino County, CACA2,224,0910.4%–

50San Benito County, CACA70,0820.4%–

51San Joaquin County, CACA823,8150.3%–

52Kings County, CACA154,3270.3%–

53Los Angeles County, CACA9,694,9340.3%–

54Tulare County, CACA485,1460.3%–

55Colusa County, CACA21,8360.2%–

56Merced County, CACA297,2600.2%–

57Imperial County, CACA181,4110.2%–

SHOWING 1–57 OF 57

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