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. The median across all 58 is 1,693. Biggest climber in the top 100 since 2020: Yolo County, CA, up 9 places to #18.

Scotch-Irish Americans: full group profile →

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SAME RANKING BYCities States Metros

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%

04▲1Sacramento County, CACA1,618,46010,142−53%

05▼1Riverside County, CACA2,544,9169,434−62%

06▲2Contra Costa County, CACA1,170,0707,177−55%

07▼1San Bernardino County, CACA2,224,0917,161−64%

08▼1Alameda County, CACA1,636,6306,931−59%

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

10▲1Sonoma County, CACA486,4445,283−52%

11▼1Ventura County, CACA830,8514,664−61%

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

13▲3San Francisco County, CACA826,0793,866−54%

14▲1San Joaquin County, CACA823,8153,761−45%

15▼1Placer County, CACA442,0813,647−46%

16▼3Kern County, CACA927,0683,535−64%

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

18▲9Yolo County, CACA224,4102,708−34%

19▼1San Mateo County, CACA743,5682,661−64%

20Marin County, CACA253,6942,628−54%

21▲2San Luis Obispo County, CACA282,3672,618−62%

22▼3Santa Cruz County, CACA258,8522,594−48%

23▲1Solano County, CACA455,3762,580−51%

24▼3Stanislaus County, CACA557,7192,207−67%

25▲1Humboldt County, CACA131,6472,033−46%

26▼1Butte County, CACA209,2111,943−69%

27▲2Monterey County, CACA433,7291,822−70%

28▼6El Dorado County, CACA192,3231,787−60%

29▲1Shasta County, CACA181,6481,693−62%

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

31▼3Tulare County, CACA485,1461,530−46%

32▲2Mendocino County, CACA88,1221,241−37%

33▼2Nevada County, CACA101,9111,237−65%

34▲2Madera County, CACA167,927798−57%

35▼3Napa County, CACA132,949707−72%

36▼1San Benito County, CACA70,082674+4%

37▲3Lake County, CACA67,772595−65%

38Merced County, CACA297,260580−66%

39▲6Sutter County, CACA98,787558−52%

40▲6Kings County, CACA154,327456−74%

41▼4Amador County, CACA41,876443−61%

42▼3Calaveras County, CACA46,605435−67%

43Tehama County, CACA64,665434−63%

44▼3Yuba County, CACA88,691347−81%

45▼3Siskiyou County, CACA42,013345−72%

46▲9Trinity County, CACA15,720261−59%

47Glenn County, CACA28,141251−17%

48▲3Modoc County, CACA8,426240+9%

49▲4Inyo County, CACA18,158202−51%

50▲2Lassen County, CACA28,117184−65%

51▼7Del Norte County, CACA26,410181−74%

52▼4Plumas County, CACA18,583166−72%

53▼4Mariposa County, CACA16,918117−81%

54Colusa County, CACA21,836109−54%

55▼5Imperial County, CACA181,41197−87%

56▲1Mono County, CACA12,50581−83%

57▼1Sierra County, CACA3,0988−95%

58Alpine County, CACA1,0436−70%

SHOWING 1–58 OF 58

Download CSV (full list, 58 rows)

UPDATED 2026-09-11 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES