RANKING · 2020 CENSUS · 58 SHOWN OF 58

Largest Scotch-Irish population, California counties · 2020

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, CACA9,694,93431,152–

02San Diego County, CACA3,282,24820,681–

03Orange County, CACA3,149,50716,666–

04Riverside County, CACA2,544,91613,431–

05Sacramento County, CACA1,618,46010,714–

06San Bernardino County, CACA2,224,0919,042–

07Alameda County, CACA1,636,6307,999–

08Contra Costa County, CACA1,170,0707,522–

09Santa Clara County, CACA1,914,3917,308–

10Ventura County, CACA830,8516,303–

11Sonoma County, CACA486,4445,604–

12Fresno County, CACA1,035,4564,944–

13Kern County, CACA927,0684,654–

14Placer County, CACA442,0813,959–

15San Joaquin County, CACA823,8153,790–

16San Francisco County, CACA826,0793,678–

17Santa Barbara County, CACA442,0653,524–

18San Mateo County, CACA743,5683,316–

19Santa Cruz County, CACA258,8522,979–

20Marin County, CACA253,6942,971–

21Stanislaus County, CACA557,7192,875–

22El Dorado County, CACA192,3232,753–

23San Luis Obispo County, CACA282,3672,685–

24Solano County, CACA455,3762,608–

25Butte County, CACA209,2112,456–

26Humboldt County, CACA131,6472,202–

27Yolo County, CACA224,4101,958–

28Tulare County, CACA485,1461,904–

29Monterey County, CACA433,7291,881–

30Shasta County, CACA181,6481,672–

31Nevada County, CACA101,9111,425–

32Napa County, CACA132,9491,064–

33Tuolumne County, CACA53,1601,038–

34Mendocino County, CACA88,1221,027–

35San Benito County, CACA70,082933–

36Madera County, CACA167,927867–

37Amador County, CACA41,876769–

38Merced County, CACA297,260751–

39Calaveras County, CACA46,605653–

40Lake County, CACA67,772641–

41Yuba County, CACA88,691629–

42Siskiyou County, CACA42,013602–

43Tehama County, CACA64,665537–

44Del Norte County, CACA26,410463–

45Sutter County, CACA98,787457–

46Kings County, CACA154,327416–

47Glenn County, CACA28,141406–

48Plumas County, CACA18,583314–

49Mariposa County, CACA16,918304–

50Imperial County, CACA181,411236–

51Modoc County, CACA8,426211–

52Lassen County, CACA28,117194–

53Inyo County, CACA18,158117–

54Colusa County, CACA21,83696–

55Trinity County, CACA15,72095–

56Sierra County, CACA3,09858–

57Mono County, CACA12,50552–

58Alpine County, CACA1,0434–

SHOWING 1–58 OF 58

Download CSV (full list, 58 rows)

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