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 2023 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.

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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 2000

01Los Angeles County, CACA9,694,93426,263–

02San Diego County, CACA3,282,24818,987–

03Orange County, CACA3,149,50715,259–

04Sacramento County, CACA1,618,46010,142–

05Riverside County, CACA2,544,9169,434–

06Contra Costa County, CACA1,170,0707,177–

07San Bernardino County, CACA2,224,0917,161–

08Alameda County, CACA1,636,6306,931–

09Santa Clara County, CACA1,914,3915,615–

10Sonoma County, CACA486,4445,283–

11Ventura County, CACA830,8514,664–

12Fresno County, CACA1,035,4564,171–

13San Francisco County, CACA826,0793,866–

14San Joaquin County, CACA823,8153,761–

15Placer County, CACA442,0813,647–

16Kern County, CACA927,0683,535–

17Santa Barbara County, CACA442,0652,878–

18Yolo County, CACA224,4102,708–

19San Mateo County, CACA743,5682,661–

20Marin County, CACA253,6942,628–

21San Luis Obispo County, CACA282,3672,618–

22Santa Cruz County, CACA258,8522,594–

23Solano County, CACA455,3762,580–

24Stanislaus County, CACA557,7192,207–

25Humboldt County, CACA131,6472,033–

26Butte County, CACA209,2111,943–

27Monterey County, CACA433,7291,822–

28El Dorado County, CACA192,3231,787–

29Shasta County, CACA181,6481,693–

30Tuolumne County, CACA53,1601,587–

31Tulare County, CACA485,1461,530–

32Mendocino County, CACA88,1221,241–

33Nevada County, CACA101,9111,237–

34Madera County, CACA167,927798–

35Napa County, CACA132,949707–

36San Benito County, CACA70,082674–

37Lake County, CACA67,772595–

38Merced County, CACA297,260580–

39Sutter County, CACA98,787558–

40Kings County, CACA154,327456–

41Amador County, CACA41,876443–

42Calaveras County, CACA46,605435–

43Tehama County, CACA64,665434–

44Yuba County, CACA88,691347–

45Siskiyou County, CACA42,013345–

46Trinity County, CACA15,720261–

47Glenn County, CACA28,141251–

48Modoc County, CACA8,426240–

49Inyo County, CACA18,158202–

50Lassen County, CACA28,117184–

51Del Norte County, CACA26,410181–

52Plumas County, CACA18,583166–

53Mariposa County, CACA16,918117–

54Colusa County, CACA21,836109–

55Imperial County, CACA181,41197–

56Mono County, CACA12,50581–

57Sierra County, CACA3,0988–

58Alpine County, CACA1,0436–

SHOWING 1–58 OF 58

Download CSV (full list, 58 rows)

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