RANKING · 2024 ACS · 57 SHOWN OF 57

Largest Welsh population, California counties

California counties ranked by the number of residents who are Welsh 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 57 counties in California that qualify, ranked against each other statewide.

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 POPULATIONVS 2010

01Los Angeles County, CACA9,694,93419,366−32%

02San Diego County, CACA3,282,24814,465−28%

03Orange County, CACA3,149,50711,326−30%

04Riverside County, CACA2,544,9167,383−26%

05Sacramento County, CACA1,618,4606,654−29%

06Contra Costa County, CACA1,170,0705,206−25%

07San Bernardino County, CACA2,224,0915,084−38%

08Alameda County, CACA1,636,6304,857−23%

09Santa Clara County, CACA1,914,3914,174−49%

10Sonoma County, CACA486,4443,784−11%

11Ventura County, CACA830,8513,465−32%

12San Francisco County, CACA826,0793,459−9%

13Placer County, CACA442,0813,082+14%

14Kern County, CACA927,0682,716−20%

15San Mateo County, CACA743,5682,314−28%

16Fresno County, CACA1,035,4562,234−44%

17San Luis Obispo County, CACA282,3672,193−19%

18Stanislaus County, CACA557,7192,166−24%

19Santa Barbara County, CACA442,0652,089−39%

20Santa Cruz County, CACA258,8521,992−19%

21San Joaquin County, CACA823,8151,937−15%

22Marin County, CACA253,6941,781−23%

23Solano County, CACA455,3761,671−10%

24Monterey County, CACA433,7291,420−33%

25Tulare County, CACA485,1461,339+12%

26Shasta County, CACA181,6481,310−23%

27Butte County, CACA209,2111,246−32%

28El Dorado County, CACA192,3231,177−40%

29Humboldt County, CACA131,6471,053−2%

30Napa County, CACA132,949827−27%

31Merced County, CACA297,260732+40%

32Yolo County, CACA224,410624−55%

33Mendocino County, CACA88,122594−44%

34Lake County, CACA67,772585−15%

35Nevada County, CACA101,911511−65%

36Tuolumne County, CACA53,160494+15%

37Madera County, CACA167,927402−48%

38Calaveras County, CACA46,605394−31%

39Inyo County, CACA18,158361+77%

40Tehama County, CACA64,665338−12%

41Trinity County, CACA15,720335−12%

42Yuba County, CACA88,691313−32%

43Lassen County, CACA28,117285+14%

44San Benito County, CACA70,082272+27%

45Siskiyou County, CACA42,013193−59%

46Sutter County, CACA98,787168−63%

47Amador County, CACA41,876166−32%

48Kings County, CACA154,327154−67%

49Glenn County, CACA28,141147−9%

50Mariposa County, CACA16,918145+4%

51Plumas County, CACA18,583101−34%

52Del Norte County, CACA26,41098−18%

53Imperial County, CACA181,41179−77%

54Modoc County, CACA8,42657−57%

55Mono County, CACA12,50550−42%

56Sierra County, CACA3,09816–

57Colusa County, CACA21,8365−89%

SHOWING 1–57 OF 57

Download CSV (full list, 57 rows)

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