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. The median across all 56 is 0.9%. Biggest climber in the top 100 since 2020: Broadwater County, MT, up 40 places to #1.

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SAME RANKING BYCities States Metros

YEAR2010 2020 2024

RANKPLACESTATEPOPSCOTCH-IRISH SHAREVS 2010

01▲40Broadwater County, MTMT8,4933.7%+1.5 pts

02▲1Prairie County, MTMT1,1123.2%−1.5 pts

03▼2Sanders County, MTMT14,0623.1%−0.3 pts

04▲6Musselshell County, MTMT5,5822.9%+0.3 pts

05▲32Powell County, MTMT7,1572.8%+0.3 pts

06▲14Jefferson County, MTMT13,3292.5%−0.4 pts

07▲25Phillips County, MTMT4,2032.4%−0.2 pts

08Carbon County, MTMT11,4662.3%−0.4 pts

09▲6Lincoln County, MTMT22,3281.9%−1.1 pts

10▲32Fallon County, MTMT2,9591.7%−3.5 pts

11▲5Park County, MTMT18,2141.7%−1.7 pts

12▲9Missoula County, MTMT123,5131.6%−1.3 pts

13Ravalli County, MTMT48,5821.6%−1.9 pts

14▲16Custer County, MTMT12,0341.6%−1.4 pts

15▼4Dawson County, MTMT8,6921.6%−1.4 pts

16▲22Golden Valley County, MTMT8441.6%−1.2 pts

17▼5Lewis and Clark County, MTMT75,3311.5%−1.7 pts

18▼11Stillwater County, MTMT9,4451.4%−0.8 pts

19▲3Gallatin County, MTMT128,7401.4%−0.8 pts

20▲11Judith Basin County, MTMT2,1621.4%−2.9 pts

21▼15Mineral County, MTMT5,1851.3%−2.2 pts

22▼5Lake County, MTMT33,3921.2%−2.7 pts

23▲6Cascade County, MTMT85,0291.2%−1.5 pts

24▲4Fergus County, MTMT11,8251.2%−1.4 pts

25▼6Garfield County, MTMT1,1481.2%−1.4 pts

26▼21Meagher County, MTMT2,1370.9%−4.9 pts

27▲9Yellowstone County, MTMT172,6920.9%−1.2 pts

28▼3Flathead County, MTMT115,4290.9%−2.0 pts

29▲5Petroleum County, MTMT5480.9%−0.6 pts

30▼16Madison County, MTMT10,0260.9%−3.9 pts

31▲18Toole County, MTMT5,2110.9%−1.1 pts

32▲14Deer Lodge County, MTMT9,7090.8%−2.7 pts

33Wibaux County, MTMT8850.8%−0.5 pts

34▼8Valley County, MTMT7,3850.8%−0.7 pts

35▼12Teton County, MTMT6,4960.8%−0.9 pts

36▲17Sheridan County, MTMT3,4360.7%−0.3 pts

37▼10Powder River County, MTMT1,7810.7%−1.1 pts

38▲9Beaverhead County, MTMT10,0430.7%−1.0 pts

39▼37Carter County, MTMT1,3830.7%−2.3 pts

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

41▼17Chouteau County, MTMT5,8650.6%−0.7 pts

42▲9Roosevelt County, MTMT10,2420.5%−0.1 pts

43▲1Pondera County, MTMT6,0720.5%−2.1 pts

44▲6Richland County, MTMT11,3770.5%−1.6 pts

45▼10Glacier County, MTMT13,4630.5%−0.1 pts

46▼28Rosebud County, MTMT8,2530.4%−1.3 pts

47▼43Wheatland County, MTMT2,1000.3%−3.1 pts

48▼9Daniels County, MTMT1,6120.3%0.0 pts

49▼1Hill County, MTMT16,1670.3%−0.8 pts

50▼17Sweet Grass County, MTMT3,7620.2%−1.3 pts

51▲1Blaine County, MTMT6,8600.2%−0.6 pts

52McCone County, MTMT1,7200.2%−1.6 pts

53▼10Granite County, MTMT3,6580.1%−3.7 pts

54▼45Treasure County, MTMT7280.1%−3.2 pts

55▼1Big Horn County, MTMT12,7520.1%−0.9 pts

56▼11Liberty County, MTMT1,9570.1%−0.6 pts

SHOWING 1–56 OF 56

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES