RANKING · 2010 CENSUS · 57 SHOWN OF 57

Largest Welsh population, California counties · 2010

California counties ranked by the number of residents who are Welsh ancestry, from the 2023 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.

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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 2000

01Los Angeles County, CACA9,694,93428,387–

02San Diego County, CACA3,282,24820,179–

03Orange County, CACA3,149,50716,156–

04Riverside County, CACA2,544,91610,024–

05Sacramento County, CACA1,618,4609,424–

06Santa Clara County, CACA1,914,3918,208–

07San Bernardino County, CACA2,224,0918,205–

08Contra Costa County, CACA1,170,0706,915–

09Alameda County, CACA1,636,6306,309–

10Ventura County, CACA830,8515,098–

11Sonoma County, CACA486,4444,244–

12Fresno County, CACA1,035,4564,002–

13San Francisco County, CACA826,0793,806–

14Santa Barbara County, CACA442,0653,424–

15Kern County, CACA927,0683,404–

16San Mateo County, CACA743,5683,202–

17Stanislaus County, CACA557,7192,848–

18San Luis Obispo County, CACA282,3672,712–

19Placer County, CACA442,0812,695–

20Santa Cruz County, CACA258,8522,453–

21Marin County, CACA253,6942,309–

22San Joaquin County, CACA823,8152,274–

23Monterey County, CACA433,7292,120–

24El Dorado County, CACA192,3231,950–

25Solano County, CACA455,3761,851–

26Butte County, CACA209,2111,845–

27Shasta County, CACA181,6481,707–

28Nevada County, CACA101,9111,457–

29Yolo County, CACA224,4101,401–

30Tulare County, CACA485,1461,199–

31Napa County, CACA132,9491,132–

32Humboldt County, CACA131,6471,079–

33Mendocino County, CACA88,1221,060–

34Madera County, CACA167,927771–

35Lake County, CACA67,772687–

36Calaveras County, CACA46,605574–

37Merced County, CACA297,260522–

38Siskiyou County, CACA42,013470–

39Kings County, CACA154,327462–

40Yuba County, CACA88,691462–

41Sutter County, CACA98,787457–

42Tuolumne County, CACA53,160429–

43Tehama County, CACA64,665383–

44Trinity County, CACA15,720381–

45Imperial County, CACA181,411345–

46Lassen County, CACA28,117249–

47Amador County, CACA41,876245–

48San Benito County, CACA70,082214–

49Inyo County, CACA18,158204–

50Glenn County, CACA28,141162–

51Plumas County, CACA18,583153–

52Mariposa County, CACA16,918139–

53Modoc County, CACA8,426133–

54Del Norte County, CACA26,410120–

55Mono County, CACA12,50586–

56Colusa County, CACA21,83647–

57Alpine County, CACA1,04318–

SHOWING 1–57 OF 57

Download CSV (full list, 57 rows)

UPDATED 2026-06-06 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES