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 (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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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

01Broadwater County, MTMT8,4933.7%–

02Prairie County, MTMT1,1123.2%–

03Sanders County, MTMT14,0623.1%–

04Musselshell County, MTMT5,5822.9%–

05Powell County, MTMT7,1572.8%–

06Jefferson County, MTMT13,3292.5%–

07Phillips County, MTMT4,2032.4%–

08Carbon County, MTMT11,4662.3%–

09Lincoln County, MTMT22,3281.9%–

10Fallon County, MTMT2,9591.7%–

11Park County, MTMT18,2141.7%–

12Missoula County, MTMT123,5131.6%–

13Ravalli County, MTMT48,5821.6%–

14Custer County, MTMT12,0341.6%–

15Dawson County, MTMT8,6921.6%–

16Golden Valley County, MTMT8441.6%–

17Lewis and Clark County, MTMT75,3311.5%–

18Stillwater County, MTMT9,4451.4%–

19Gallatin County, MTMT128,7401.4%–

20Judith Basin County, MTMT2,1621.4%–

21Mineral County, MTMT5,1851.3%–

22Lake County, MTMT33,3921.2%–

23Cascade County, MTMT85,0291.2%–

24Fergus County, MTMT11,8251.2%–

25Garfield County, MTMT1,1481.2%–

26Meagher County, MTMT2,1370.9%–

27Yellowstone County, MTMT172,6920.9%–

28Flathead County, MTMT115,4290.9%–

29Petroleum County, MTMT5480.9%–

30Madison County, MTMT10,0260.9%–

31Toole County, MTMT5,2110.9%–

32Deer Lodge County, MTMT9,7090.8%–

33Wibaux County, MTMT8850.8%–

34Valley County, MTMT7,3850.8%–

35Teton County, MTMT6,4960.8%–

36Sheridan County, MTMT3,4360.7%–

37Powder River County, MTMT1,7810.7%–

38Beaverhead County, MTMT10,0430.7%–

39Carter County, MTMT1,3830.7%–

40Silver Bow County, MTMT36,1180.6%–

41Chouteau County, MTMT5,8650.6%–

42Roosevelt County, MTMT10,2420.5%–

43Pondera County, MTMT6,0720.5%–

44Richland County, MTMT11,3770.5%–

45Glacier County, MTMT13,4630.5%–

46Rosebud County, MTMT8,2530.4%–

47Wheatland County, MTMT2,1000.3%–

48Daniels County, MTMT1,6120.3%–

49Hill County, MTMT16,1670.3%–

50Sweet Grass County, MTMT3,7620.2%–

51Blaine County, MTMT6,8600.2%–

52McCone County, MTMT1,7200.2%–

53Granite County, MTMT3,6580.1%–

54Treasure County, MTMT7280.1%–

55Big Horn County, MTMT12,7520.1%–

56Liberty County, MTMT1,9570.1%–

SHOWING 1–56 OF 56

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