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 (2020 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.

Scotch-Irish Americans: full group profile →

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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 2010

01Sanders County, MTMT14,0624.9%+1.5 pts

02Carter County, MTMT1,3834.6%+1.6 pts

03Prairie County, MTMT1,1124.1%−0.6 pts

04Wheatland County, MTMT2,1003.7%+0.3 pts

05Meagher County, MTMT2,1373.7%−2.1 pts

06Mineral County, MTMT5,1853.3%−0.1 pts

07Stillwater County, MTMT9,4452.9%+0.7 pts

08Carbon County, MTMT11,4662.4%−0.3 pts

09Treasure County, MTMT7282.3%−1.0 pts

10Musselshell County, MTMT5,5822.2%−0.4 pts

11Dawson County, MTMT8,6922.1%−0.9 pts

12Lewis and Clark County, MTMT75,3312.1%−1.1 pts

13Ravalli County, MTMT48,5822.1%−1.4 pts

14Madison County, MTMT10,0262.1%−2.7 pts

15Lincoln County, MTMT22,3282.0%−1.0 pts

16Park County, MTMT18,2141.8%−1.5 pts

17Lake County, MTMT33,3921.8%−2.1 pts

18Rosebud County, MTMT8,2531.8%+0.2 pts

19Garfield County, MTMT1,1481.7%−0.9 pts

20Jefferson County, MTMT13,3291.7%−1.3 pts

21Missoula County, MTMT123,5131.7%−1.3 pts

22Gallatin County, MTMT128,7401.6%−0.7 pts

23Teton County, MTMT6,4961.5%−0.2 pts

24Chouteau County, MTMT5,8651.5%+0.3 pts

25Flathead County, MTMT115,4291.4%−1.5 pts

26Valley County, MTMT7,3851.4%−0.2 pts

27Powder River County, MTMT1,7811.3%−0.5 pts

28Fergus County, MTMT11,8251.3%−1.3 pts

29Cascade County, MTMT85,0291.3%−1.4 pts

30Custer County, MTMT12,0341.2%−1.8 pts

31Judith Basin County, MTMT2,1621.1%−3.1 pts

32Phillips County, MTMT4,2031.1%−1.6 pts

33Sweet Grass County, MTMT3,7621.1%−0.5 pts

34Petroleum County, MTMT5481.1%−0.4 pts

35Glacier County, MTMT13,4631.1%+0.5 pts

36Yellowstone County, MTMT172,6921.1%−1.1 pts

37Powell County, MTMT7,1571.0%−1.4 pts

38Golden Valley County, MTMT8441.0%−1.7 pts

39Daniels County, MTMT1,6120.9%+0.6 pts

40Silver Bow County, MTMT36,1180.8%−1.7 pts

41Broadwater County, MTMT8,4930.8%−1.4 pts

42Fallon County, MTMT2,9590.7%−4.5 pts

43Granite County, MTMT3,6580.7%−3.2 pts

44Pondera County, MTMT6,0720.6%−1.9 pts

45Liberty County, MTMT1,9570.6%−0.1 pts

46Deer Lodge County, MTMT9,7090.6%−3.0 pts

47Beaverhead County, MTMT10,0430.5%−1.3 pts

48Hill County, MTMT16,1670.5%−0.7 pts

49Toole County, MTMT5,2110.4%−1.6 pts

50Richland County, MTMT11,3770.4%−1.7 pts

51Roosevelt County, MTMT10,2420.4%−0.2 pts

52Blaine County, MTMT6,8600.2%−0.6 pts

53Sheridan County, MTMT3,4360.1%−0.9 pts

54Big Horn County, MTMT12,7520.1%−0.9 pts

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UPDATED 2026-08-08 · DATA: US CENSUS BUREAU DECENNIAL CENSUS