RANKING · 2024 ACS · 58 SHOWN OF 58

Highest Scotch-Irish population share, California counties

California counties ranked by the share of all residents who are Scotch-Irish ancestry (2024 American Community Survey). A concentration measure: Scotch-Irish residents as a percentage of total population. 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

YEAR2010 2020 2024

RANKPLACESTATEPOPSCOTCH-IRISH SHAREVS 2010

01Tuolumne County, CACA53,1602.9%+0.2 pts

02Modoc County, CACA8,4262.8%+0.5 pts

03Trinity County, CACA15,7201.6%−3.0 pts

04Humboldt County, CACA131,6471.5%−1.3 pts

05Mendocino County, CACA88,1221.4%−0.9 pts

06Yolo County, CACA224,4101.2%−0.9 pts

07Nevada County, CACA101,9111.2%−2.4 pts

08Sonoma County, CACA486,4441.1%−1.3 pts

09Inyo County, CACA18,1581.1%−1.2 pts

10Amador County, CACA41,8761.1%−1.9 pts

11Marin County, CACA253,6941.0%−1.3 pts

12San Benito County, CACA70,0821.0%−0.2 pts

13Santa Cruz County, CACA258,8521.0%−1.0 pts

14Calaveras County, CACA46,6050.9%−1.9 pts

15Butte County, CACA209,2110.9%−2.0 pts

16Shasta County, CACA181,6480.9%−1.6 pts

17San Luis Obispo County, CACA282,3670.9%−1.6 pts

18El Dorado County, CACA192,3230.9%−1.6 pts

19Glenn County, CACA28,1410.9%−0.2 pts

20Lake County, CACA67,7720.9%−1.8 pts

21Placer County, CACA442,0810.9%−1.1 pts

22Plumas County, CACA18,5830.9%−2.0 pts

23Siskiyou County, CACA42,0130.8%−2.0 pts

24Mariposa County, CACA16,9180.7%−2.7 pts

25Del Norte County, CACA26,4100.7%−1.8 pts

26Tehama County, CACA64,6650.7%−1.2 pts

27Santa Barbara County, CACA442,0650.6%−1.1 pts

28Sacramento County, CACA1,618,4600.6%−0.9 pts

29Mono County, CACA12,5050.6%−2.9 pts

30Contra Costa County, CACA1,170,0700.6%−0.9 pts

31Lassen County, CACA28,1170.6%−0.9 pts

32San Diego County, CACA3,282,2480.6%−0.9 pts

33Solano County, CACA455,3760.6%−0.7 pts

34Sutter County, CACA98,7870.6%−0.7 pts

35Ventura County, CACA830,8510.6%−0.9 pts

36Napa County, CACA132,9490.5%−1.3 pts

37Madera County, CACA167,9270.5%−0.8 pts

38Colusa County, CACA21,8360.5%−0.6 pts

39Orange County, CACA3,149,5070.5%−0.8 pts

40San Joaquin County, CACA823,8150.5%−0.5 pts

41San Francisco County, CACA826,0790.5%−0.6 pts

42Alameda County, CACA1,636,6300.4%−0.7 pts

43Monterey County, CACA433,7290.4%−1.1 pts

44Yuba County, CACA88,6910.4%−2.2 pts

45Fresno County, CACA1,035,4560.4%−0.6 pts

46Stanislaus County, CACA557,7190.4%−0.9 pts

47Kern County, CACA927,0680.4%−0.8 pts

48Riverside County, CACA2,544,9160.4%−0.8 pts

49Alpine County, CACA1,0430.4%−1.3 pts

50San Mateo County, CACA743,5680.4%−0.7 pts

51San Bernardino County, CACA2,224,0910.3%−0.7 pts

52Tulare County, CACA485,1460.3%−0.3 pts

53Kings County, CACA154,3270.3%−0.9 pts

54Santa Clara County, CACA1,914,3910.3%−0.6 pts

55Sierra County, CACA3,0980.3%−4.8 pts

56Los Angeles County, CACA9,694,9340.3%−0.4 pts

57Merced County, CACA297,2600.2%−0.5 pts

58Imperial County, CACA181,4110.1%−0.4 pts

SHOWING 1–58 OF 58

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UPDATED 2026-08-08 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES