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. The median across all 58 is 0.6%. Biggest climber in the top 100 since 2020: Trinity County, CA, up 26 places to #3.

Scotch-Irish Americans: full group profile →

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SAME RANKING BYCities States Metros

YEAR2010 2020 2024

RANKPLACESTATEPOPSCOTCH-IRISH SHAREVS 2010

01▲3Tuolumne County, CACA53,1602.9%+0.2 pts

02▼1Modoc County, CACA8,4262.8%+0.5 pts

03▲26Trinity County, CACA15,7201.6%−3.0 pts

04▲4Humboldt County, CACA131,6471.5%−1.3 pts

05▲10Mendocino County, CACA88,1221.4%−0.9 pts

06▲18Yolo County, CACA224,4101.2%−0.9 pts

07▲5Nevada County, CACA101,9111.2%−2.4 pts

08▲9Sonoma County, CACA486,4441.1%−1.3 pts

09▲24Inyo County, CACA18,1581.1%−1.2 pts

10▼7Amador County, CACA41,8761.1%−1.9 pts

11▲5Marin County, CACA253,6941.0%−1.3 pts

12▼3San Benito County, CACA70,0821.0%−0.2 pts

13▲6Santa Cruz County, CACA258,8521.0%−1.0 pts

14▼1Calaveras County, CACA46,6050.9%−1.9 pts

15▲3Butte County, CACA209,2110.9%−2.0 pts

16▲7Shasta County, CACA181,6480.9%−1.6 pts

17▲5San Luis Obispo County, CACA282,3670.9%−1.6 pts

18▼7El Dorado County, CACA192,3230.9%−1.6 pts

19▼9Glenn County, CACA28,1410.9%−0.2 pts

20▲1Lake County, CACA67,7720.9%−1.8 pts

21▼1Placer County, CACA442,0810.9%−1.1 pts

22▼15Plumas County, CACA18,5830.9%−2.0 pts

23▼9Siskiyou County, CACA42,0130.8%−2.0 pts

24▼19Mariposa County, CACA16,9180.7%−2.7 pts

25▼19Del Norte County, CACA26,4100.7%−1.8 pts

26▼1Tehama County, CACA64,6650.7%−1.2 pts

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

28▲3Sacramento County, CACA1,618,4600.6%−0.9 pts

29▲24Mono County, CACA12,5050.6%−2.9 pts

30▲2Contra Costa County, CACA1,170,0700.6%−0.9 pts

31▲3Lassen County, CACA28,1170.6%−0.9 pts

32▲3San Diego County, CACA3,282,2480.6%−0.9 pts

33▲3Solano County, CACA455,3760.6%−0.7 pts

34▲11Sutter County, CACA98,7870.6%−0.7 pts

35▼5Ventura County, CACA830,8510.6%−0.9 pts

36▼8Napa County, CACA132,9490.5%−1.3 pts

37Madera County, CACA167,9270.5%−0.8 pts

38▲8Colusa County, CACA21,8360.5%−0.6 pts

39▲1Orange County, CACA3,149,5070.5%−0.8 pts

40▲2San Joaquin County, CACA823,8150.5%−0.5 pts

41▲8San Francisco County, CACA826,0790.5%−0.6 pts

42▲2Alameda County, CACA1,636,6300.4%−0.7 pts

43▲4Monterey County, CACA433,7290.4%−1.1 pts

44▼18Yuba County, CACA88,6910.4%−2.2 pts

45▼2Fresno County, CACA1,035,4560.4%−0.6 pts

46▼7Stanislaus County, CACA557,7190.4%−0.9 pts

47▼6Kern County, CACA927,0680.4%−0.8 pts

48▼10Riverside County, CACA2,544,9160.4%−0.8 pts

49▲5Alpine County, CACA1,0430.4%−1.3 pts

50▼2San Mateo County, CACA743,5680.4%−0.7 pts

51▼1San Bernardino County, CACA2,224,0910.3%−0.7 pts

52▼1Tulare County, CACA485,1460.3%−0.3 pts

53▲3Kings County, CACA154,3270.3%−0.9 pts

54▼2Santa Clara County, CACA1,914,3910.3%−0.6 pts

55▼53Sierra County, CACA3,0980.3%−4.8 pts

56▼1Los 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 2026-09-11 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES