RANKING · 2024 ACS · 56 SHOWN OF 56

Highest Scotch-Irish population share, Montana counties

Montana 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 56 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

01Broadwater County, MTMT8,4933.7%+1.5 pts

02Prairie County, MTMT1,1123.2%−1.5 pts

03Sanders County, MTMT14,0623.1%−0.3 pts

04Musselshell County, MTMT5,5822.9%+0.3 pts

05Powell County, MTMT7,1572.8%+0.3 pts

06Jefferson County, MTMT13,3292.5%−0.4 pts

07Phillips County, MTMT4,2032.4%−0.2 pts

08Carbon County, MTMT11,4662.3%−0.4 pts

09Lincoln County, MTMT22,3281.9%−1.1 pts

10Fallon County, MTMT2,9591.7%−3.5 pts

11Park County, MTMT18,2141.7%−1.7 pts

12Missoula County, MTMT123,5131.6%−1.3 pts

13Ravalli County, MTMT48,5821.6%−1.9 pts

14Custer County, MTMT12,0341.6%−1.4 pts

15Dawson County, MTMT8,6921.6%−1.4 pts

16Golden Valley County, MTMT8441.6%−1.2 pts

17Lewis and Clark County, MTMT75,3311.5%−1.7 pts

18Stillwater County, MTMT9,4451.4%−0.8 pts

19Gallatin County, MTMT128,7401.4%−0.8 pts

20Judith Basin County, MTMT2,1621.4%−2.9 pts

21Mineral County, MTMT5,1851.3%−2.2 pts

22Lake County, MTMT33,3921.2%−2.7 pts

23Cascade County, MTMT85,0291.2%−1.5 pts

24Fergus County, MTMT11,8251.2%−1.4 pts

25Garfield County, MTMT1,1481.2%−1.4 pts

26Meagher County, MTMT2,1370.9%−4.9 pts

27Yellowstone County, MTMT172,6920.9%−1.2 pts

28Flathead County, MTMT115,4290.9%−2.0 pts

29Petroleum County, MTMT5480.9%−0.6 pts

30Madison County, MTMT10,0260.9%−3.9 pts

31Toole County, MTMT5,2110.9%−1.1 pts

32Deer Lodge County, MTMT9,7090.8%−2.7 pts

33Wibaux County, MTMT8850.8%−0.5 pts

34Valley County, MTMT7,3850.8%−0.7 pts

35Teton County, MTMT6,4960.8%−0.9 pts

36Sheridan County, MTMT3,4360.7%−0.3 pts

37Powder River County, MTMT1,7810.7%−1.1 pts

38Beaverhead County, MTMT10,0430.7%−1.0 pts

39Carter County, MTMT1,3830.7%−2.3 pts

40Silver Bow County, MTMT36,1180.6%−1.9 pts

41Chouteau County, MTMT5,8650.6%−0.7 pts

42Roosevelt County, MTMT10,2420.5%−0.1 pts

43Pondera County, MTMT6,0720.5%−2.1 pts

44Richland County, MTMT11,3770.5%−1.6 pts

45Glacier County, MTMT13,4630.5%−0.1 pts

46Rosebud County, MTMT8,2530.4%−1.3 pts

47Wheatland County, MTMT2,1000.3%−3.1 pts

48Daniels County, MTMT1,6120.3%−0.0 pts

49Hill County, MTMT16,1670.3%−0.8 pts

50Sweet Grass County, MTMT3,7620.2%−1.3 pts

51Blaine County, MTMT6,8600.2%−0.6 pts

52McCone County, MTMT1,7200.2%−1.6 pts

53Granite County, MTMT3,6580.1%−3.7 pts

54Treasure County, MTMT7280.1%−3.2 pts

55Big Horn County, MTMT12,7520.1%−0.9 pts

56Liberty County, MTMT1,9570.1%−0.6 pts

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