RANKING · 2024 ACS · 58 SHOWN OF 58

Largest Scotch-Irish population, California counties

California counties ranked by the number of residents who are Scotch-Irish 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 58 counties in California that qualify, ranked against each other statewide.

Scotch-Irish 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

RANKPLACESTATEPOPSCOTCH-IRISH POPULATIONVS 2010

01Los Angeles County, CACA9,694,93426,263−60%

02San Diego County, CACA3,282,24818,987−59%

03Orange County, CACA3,149,50715,259−59%

04Sacramento County, CACA1,618,46010,142−53%

05Riverside County, CACA2,544,9169,434−62%

06Contra Costa County, CACA1,170,0707,177−55%

07San Bernardino County, CACA2,224,0917,161−64%

08Alameda County, CACA1,636,6306,931−59%

09Santa Clara County, CACA1,914,3915,615−66%

10Sonoma County, CACA486,4445,283−52%

11Ventura County, CACA830,8514,664−61%

12Fresno County, CACA1,035,4564,171−54%

13San Francisco County, CACA826,0793,866−54%

14San Joaquin County, CACA823,8153,761−45%

15Placer County, CACA442,0813,647−46%

16Kern County, CACA927,0683,535−64%

17Santa Barbara County, CACA442,0652,878−60%

18Yolo County, CACA224,4102,708−34%

19San Mateo County, CACA743,5682,661−64%

20Marin County, CACA253,6942,628−54%

21San Luis Obispo County, CACA282,3672,618−62%

22Santa Cruz County, CACA258,8522,594−48%

23Solano County, CACA455,3762,580−51%

24Stanislaus County, CACA557,7192,207−67%

25Humboldt County, CACA131,6472,033−46%

26Butte County, CACA209,2111,943−69%

27Monterey County, CACA433,7291,822−70%

28El Dorado County, CACA192,3231,787−60%

29Shasta County, CACA181,6481,693−62%

30Tuolumne County, CACA53,1601,587+3%

31Tulare County, CACA485,1461,530−46%

32Mendocino County, CACA88,1221,241−37%

33Nevada County, CACA101,9111,237−65%

34Madera County, CACA167,927798−57%

35Napa County, CACA132,949707−72%

36San Benito County, CACA70,082674+4%

37Lake County, CACA67,772595−65%

38Merced County, CACA297,260580−66%

39Sutter County, CACA98,787558−52%

40Kings County, CACA154,327456−74%

41Amador County, CACA41,876443−61%

42Calaveras County, CACA46,605435−67%

43Tehama County, CACA64,665434−63%

44Yuba County, CACA88,691347−81%

45Siskiyou County, CACA42,013345−72%

46Trinity County, CACA15,720261−59%

47Glenn County, CACA28,141251−17%

48Modoc County, CACA8,426240+9%

49Inyo County, CACA18,158202−51%

50Lassen County, CACA28,117184−65%

51Del Norte County, CACA26,410181−74%

52Plumas County, CACA18,583166−72%

53Mariposa County, CACA16,918117−81%

54Colusa County, CACA21,836109−54%

55Imperial County, CACA181,41197−87%

56Mono County, CACA12,50581−83%

57Sierra County, CACA3,0988−95%

58Alpine County, CACA1,0436−70%

SHOWING 1–58 OF 58

Download CSV (full list, 58 rows)

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