RANKING · 2020 CENSUS · 54 SHOWN OF 54

Highest Scotch-Irish population share, Montana counties · 2020

Montana counties ranked by the share of all residents who are Scotch-Irish ancestry (2023 American Community Survey). A concentration measure: Scotch-Irish residents as a percentage of total population. This list covers the 54 counties in Montana 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 SHAREVS 2000

01Sanders County, MTMT14,0624.9%–

02Carter County, MTMT1,3834.6%–

03Prairie County, MTMT1,1124.1%–

04Wheatland County, MTMT2,1003.7%–

05Meagher County, MTMT2,1373.7%–

06Mineral County, MTMT5,1853.3%–

07Stillwater County, MTMT9,4452.9%–

08Carbon County, MTMT11,4662.4%–

09Treasure County, MTMT7282.3%–

10Musselshell County, MTMT5,5822.2%–

11Dawson County, MTMT8,6922.1%–

12Lewis and Clark County, MTMT75,3312.1%–

13Ravalli County, MTMT48,5822.1%–

14Madison County, MTMT10,0262.1%–

15Lincoln County, MTMT22,3282.0%–

16Park County, MTMT18,2141.8%–

17Lake County, MTMT33,3921.8%–

18Rosebud County, MTMT8,2531.8%–

19Garfield County, MTMT1,1481.7%–

20Jefferson County, MTMT13,3291.7%–

21Missoula County, MTMT123,5131.7%–

22Gallatin County, MTMT128,7401.6%–

23Teton County, MTMT6,4961.5%–

24Chouteau County, MTMT5,8651.5%–

25Flathead County, MTMT115,4291.4%–

26Valley County, MTMT7,3851.4%–

27Powder River County, MTMT1,7811.3%–

28Fergus County, MTMT11,8251.3%–

29Cascade County, MTMT85,0291.3%–

30Custer County, MTMT12,0341.2%–

31Judith Basin County, MTMT2,1621.1%–

32Phillips County, MTMT4,2031.1%–

33Sweet Grass County, MTMT3,7621.1%–

34Petroleum County, MTMT5481.1%–

35Glacier County, MTMT13,4631.1%–

36Yellowstone County, MTMT172,6921.1%–

37Powell County, MTMT7,1571.0%–

38Golden Valley County, MTMT8441.0%–

39Daniels County, MTMT1,6120.9%–

40Silver Bow County, MTMT36,1180.8%–

41Broadwater County, MTMT8,4930.8%–

42Fallon County, MTMT2,9590.7%–

43Granite County, MTMT3,6580.7%–

44Pondera County, MTMT6,0720.6%–

45Liberty County, MTMT1,9570.6%–

46Deer Lodge County, MTMT9,7090.6%–

47Beaverhead County, MTMT10,0430.5%–

48Hill County, MTMT16,1670.5%–

49Toole County, MTMT5,2110.4%–

50Richland County, MTMT11,3770.4%–

51Roosevelt County, MTMT10,2420.4%–

52Blaine County, MTMT6,8600.2%–

53Sheridan County, MTMT3,4360.1%–

54Big Horn County, MTMT12,7520.1%–

SHOWING 1–54 OF 54

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