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 (2020 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

YEAR2010 2020 2024

RANKPLACESTATEPOPWELSH SHAREVS 2010

01Sierra County, CACA3,0982.9%–

02Mono County, CACA12,5052.3%+1.7 pts

03Inyo County, CACA18,1581.6%+0.5 pts

04Trinity County, CACA15,7201.4%−1.3 pts

05Tuolumne County, CACA53,1601.4%+0.6 pts

06Plumas County, CACA18,5831.4%+0.6 pts

07Humboldt County, CACA131,6471.1%+0.3 pts

08Mariposa County, CACA16,9181.1%+0.3 pts

09Calaveras County, CACA46,6051.1%−0.2 pts

10El Dorado County, CACA192,3231.0%0.0 pts

11Lake County, CACA67,7721.0%0.0 pts

12Lassen County, CACA28,1171.0%+0.2 pts

13Del Norte County, CACA26,4100.9%+0.5 pts

14Amador County, CACA41,8760.9%+0.3 pts

15Placer County, CACA442,0810.8%0.0 pts

16San Luis Obispo County, CACA282,3670.8%−0.2 pts

17Nevada County, CACA101,9110.8%−0.7 pts

18Modoc County, CACA8,4260.8%−0.6 pts

19Yuba County, CACA88,6910.8%+0.1 pts

20Butte County, CACA209,2110.8%−0.1 pts

21Sonoma County, CACA486,4440.8%−0.1 pts

22Shasta County, CACA181,6480.8%−0.2 pts

23Mendocino County, CACA88,1220.7%−0.5 pts

24Santa Cruz County, CACA258,8520.7%−0.2 pts

25Siskiyou County, CACA42,0130.7%−0.3 pts

26Marin County, CACA253,6940.7%−0.3 pts

27Napa County, CACA132,9490.6%−0.2 pts

28Sutter County, CACA98,7870.6%+0.1 pts

29Tehama County, CACA64,6650.6%0.0 pts

30Contra Costa County, CACA1,170,0700.6%−0.1 pts

31Santa Barbara County, CACA442,0650.6%−0.3 pts

32Sacramento County, CACA1,618,4600.5%−0.1 pts

33Ventura County, CACA830,8510.5%−0.1 pts

34San Diego County, CACA3,282,2480.5%−0.2 pts

35San Benito County, CACA70,0820.5%+0.1 pts

36Orange County, CACA3,149,5070.4%−0.1 pts

37Stanislaus County, CACA557,7190.4%−0.1 pts

38Yolo County, CACA224,4100.4%−0.3 pts

39Solano County, CACA455,3760.4%0.0 pts

40San Francisco County, CACA826,0790.4%−0.1 pts

41Kern County, CACA927,0680.4%0.0 pts

42Riverside County, CACA2,544,9160.4%−0.1 pts

43San Mateo County, CACA743,5680.4%−0.1 pts

44Alameda County, CACA1,636,6300.3%−0.1 pts

45Santa Clara County, CACA1,914,3910.3%−0.2 pts

46Monterey County, CACA433,7290.3%−0.2 pts

47Merced County, CACA297,2600.3%+0.1 pts

48Glenn County, CACA28,1410.3%−0.3 pts

49Tulare County, CACA485,1460.3%0.0 pts

50Madera County, CACA167,9270.3%−0.2 pts

51Kings County, CACA154,3270.3%0.0 pts

52San Bernardino County, CACA2,224,0910.3%−0.1 pts

53San Joaquin County, CACA823,8150.3%−0.1 pts

54Colusa County, CACA21,8360.3%0.0 pts

55Fresno County, CACA1,035,4560.3%−0.2 pts

56Los Angeles County, CACA9,694,9340.2%−0.1 pts

57Imperial County, CACA181,4110.1%−0.1 pts

SHOWING 1–57 OF 57

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