RANKING · 2010 CENSUS · 56 SHOWN OF 56

Highest Scotch-Irish population share, Montana counties · 2010

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 56 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

01Meagher County, MTMT2,1375.9%–

02Fallon County, MTMT2,9595.3%–

03Madison County, MTMT10,0264.8%–

04Prairie County, MTMT1,1124.7%–

05Judith Basin County, MTMT2,1624.2%–

06Lake County, MTMT33,3923.9%–

07Granite County, MTMT3,6583.8%–

08Deer Lodge County, MTMT9,7093.6%–

09Ravalli County, MTMT48,5823.5%–

10Mineral County, MTMT5,1853.5%–

11Sanders County, MTMT14,0623.5%–

12Wheatland County, MTMT2,1003.4%–

13Park County, MTMT18,2143.3%–

14Treasure County, MTMT7283.3%–

15Lewis and Clark County, MTMT75,3313.2%–

16Custer County, MTMT12,0343.0%–

17Dawson County, MTMT8,6923.0%–

18Lincoln County, MTMT22,3283.0%–

19Missoula County, MTMT123,5133.0%–

20Jefferson County, MTMT13,3293.0%–

21Carter County, MTMT1,3832.9%–

22Flathead County, MTMT115,4292.9%–

23Cascade County, MTMT85,0292.7%–

24Carbon County, MTMT11,4662.7%–

25Golden Valley County, MTMT8442.7%–

26Phillips County, MTMT4,2032.7%–

27Fergus County, MTMT11,8252.6%–

28Garfield County, MTMT1,1482.6%–

29Musselshell County, MTMT5,5822.6%–

30Pondera County, MTMT6,0722.6%–

31Silver Bow County, MTMT36,1182.5%–

32Powell County, MTMT7,1572.4%–

33Gallatin County, MTMT128,7402.3%–

34Stillwater County, MTMT9,4452.2%–

35Broadwater County, MTMT8,4932.2%–

36Yellowstone County, MTMT172,6922.1%–

37Richland County, MTMT11,3772.1%–

38Toole County, MTMT5,2112.0%–

39McCone County, MTMT1,7201.8%–

40Powder River County, MTMT1,7811.8%–

41Beaverhead County, MTMT10,0431.7%–

42Teton County, MTMT6,4961.7%–

43Rosebud County, MTMT8,2531.6%–

44Sweet Grass County, MTMT3,7621.6%–

45Valley County, MTMT7,3851.6%–

46Petroleum County, MTMT5481.5%–

47Wibaux County, MTMT8851.3%–

48Chouteau County, MTMT5,8651.2%–

49Hill County, MTMT16,1671.1%–

50Big Horn County, MTMT12,7521.0%–

51Sheridan County, MTMT3,4361.0%–

52Blaine County, MTMT6,8600.8%–

53Liberty County, MTMT1,9570.7%–

54Glacier County, MTMT13,4630.6%–

55Roosevelt County, MTMT10,2420.6%–

56Daniels County, MTMT1,6120.4%–

SHOWING 1–56 OF 56

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