RANKING · 2020 CENSUS · 57 SHOWN OF 57

Highest Welsh population share, California counties · 2020

California counties ranked by the share of all residents who are Welsh ancestry (2023 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.

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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 2000

01Sierra County, CACA3,0982.9%–

02Mono County, CACA12,5052.3%–

03Inyo County, CACA18,1581.6%–

04Trinity County, CACA15,7201.4%–

05Tuolumne County, CACA53,1601.4%–

06Plumas County, CACA18,5831.4%–

07Humboldt County, CACA131,6471.1%–

08Mariposa County, CACA16,9181.1%–

09Calaveras County, CACA46,6051.1%–

10El Dorado County, CACA192,3231.0%–

11Lake County, CACA67,7721.0%–

12Lassen County, CACA28,1171.0%–

13Del Norte County, CACA26,4100.9%–

14Amador County, CACA41,8760.9%–

15Placer County, CACA442,0810.8%–

16San Luis Obispo County, CACA282,3670.8%–

17Nevada County, CACA101,9110.8%–

18Modoc County, CACA8,4260.8%–

19Yuba County, CACA88,6910.8%–

20Butte County, CACA209,2110.8%–

21Sonoma County, CACA486,4440.8%–

22Shasta County, CACA181,6480.8%–

23Mendocino County, CACA88,1220.7%–

24Santa Cruz County, CACA258,8520.7%–

25Siskiyou County, CACA42,0130.7%–

26Marin County, CACA253,6940.7%–

27Napa County, CACA132,9490.6%–

28Sutter County, CACA98,7870.6%–

29Tehama County, CACA64,6650.6%–

30Contra Costa County, CACA1,170,0700.6%–

31Santa Barbara County, CACA442,0650.6%–

32Sacramento County, CACA1,618,4600.5%–

33Ventura County, CACA830,8510.5%–

34San Diego County, CACA3,282,2480.5%–

35San Benito County, CACA70,0820.5%–

36Orange County, CACA3,149,5070.4%–

37Stanislaus County, CACA557,7190.4%–

38Yolo County, CACA224,4100.4%–

39Solano County, CACA455,3760.4%–

40San Francisco County, CACA826,0790.4%–

41Kern County, CACA927,0680.4%–

42Riverside County, CACA2,544,9160.4%–

43San Mateo County, CACA743,5680.4%–

44Alameda County, CACA1,636,6300.3%–

45Santa Clara County, CACA1,914,3910.3%–

46Monterey County, CACA433,7290.3%–

47Merced County, CACA297,2600.3%–

48Glenn County, CACA28,1410.3%–

49Tulare County, CACA485,1460.3%–

50Madera County, CACA167,9270.3%–

51Kings County, CACA154,3270.3%–

52San Bernardino County, CACA2,224,0910.3%–

53San Joaquin County, CACA823,8150.3%–

54Colusa County, CACA21,8360.3%–

55Fresno County, CACA1,035,4560.3%–

56Los Angeles County, CACA9,694,9340.2%–

57Imperial County, CACA181,4110.1%–

SHOWING 1–57 OF 57

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