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. The median across all 57 is 1,053. Biggest climber in the top 100 since 2020: Trinity County, CA, up 12 places to #41.

Welsh Americans: full group profile →

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SAME RANKING BYCities States Metros

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%

07▲1San Bernardino County, CACA2,224,0915,084−38%

08▲1Alameda County, CACA1,636,6304,857−23%

09▼2Santa Clara County, CACA1,914,3914,174−49%

10▲1Sonoma County, CACA486,4443,784−11%

11▼1Ventura County, CACA830,8513,465−32%

12▲1San Francisco County, CACA826,0793,459−9%

13▲1Placer County, CACA442,0813,082+14%

14▼2Kern County, CACA927,0682,716−20%

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

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

17▲1San Luis Obispo County, CACA282,3672,193−19%

18▲1Stanislaus County, CACA557,7192,166−24%

19▼2Santa Barbara County, CACA442,0652,089−39%

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

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

22▲2Marin County, CACA253,6941,781−23%

23Solano County, CACA455,3761,671−10%

24▲4Monterey County, CACA433,7291,420−33%

25▲2Tulare County, CACA485,1461,339+12%

26▲3Shasta County, CACA181,6481,310−23%

27▼2Butte County, CACA209,2111,246−32%

28▼6El Dorado County, CACA192,3231,177−40%

29▼3Humboldt County, CACA131,6471,053−2%

30▲1Napa County, CACA132,949827−27%

31▲1Merced County, CACA297,260732+40%

32▼2Yolo County, CACA224,410624−55%

33▲3Mendocino County, CACA88,122594−44%

34▲1Lake County, CACA67,772585−15%

35▼2Nevada County, CACA101,911511−65%

36▼2Tuolumne County, CACA53,160494+15%

37▲3Madera County, CACA167,927402−48%

38▲1Calaveras County, CACA46,605394−31%

39▲9Inyo County, CACA18,158361+77%

40▲2Tehama County, CACA64,665338−12%

41▲12Trinity County, CACA15,720335−12%

42▼5Yuba County, CACA88,691313−32%

43▲4Lassen County, CACA28,117285+14%

44▲2San Benito County, CACA70,082272+27%

45Siskiyou County, CACA42,013193−59%

46▼8Sutter County, CACA98,787168−63%

47▼4Amador County, CACA41,876166−32%

48▼7Kings County, CACA154,327154−67%

49▲5Glenn County, CACA28,141147−9%

50▲2Mariposa County, CACA16,918145+4%

51▼2Plumas County, CACA18,583101−34%

52▼1Del Norte County, CACA26,41098−18%

53▼3Imperial County, CACA181,41179−77%

54▲2Modoc County, CACA8,42657−57%

55▼11Mono County, CACA12,50550−42%

56▼1Sierra County, CACA3,09816–

57Colusa County, CACA21,8365−89%

SHOWING 1–57 OF 57

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