RANKING · 2024 ACS · 56 SHOWN OF 56

Largest Scotch-Irish population, Montana counties

Montana counties ranked by the number of residents who are Scotch-Irish ancestry, from the 2023 American Community Survey detailed-origin tables. Each list covers the full eligible universe; download the complete data as CSV. This list covers the 56 counties in Montana that qualify, ranked against each other statewide.

MontanaAll states All rankings

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 POPULATIONVS 2000

01Missoula County, MTMT123,5131,972–

02Gallatin County, MTMT128,7401,751–

03Yellowstone County, MTMT172,6921,554–

04Lewis and Clark County, MTMT75,3311,069–

05Cascade County, MTMT85,0291,018–

06Flathead County, MTMT115,429996–

07Ravalli County, MTMT48,582743–

08Sanders County, MTMT14,062417–

09Lincoln County, MTMT22,328407–

10Lake County, MTMT33,392401–

11Jefferson County, MTMT13,329325–

12Park County, MTMT18,214297–

13Broadwater County, MTMT8,493287–

14Carbon County, MTMT11,466255–

15Silver Bow County, MTMT36,118214–

16Powell County, MTMT7,157195–

17Custer County, MTMT12,034190–

18Musselshell County, MTMT5,582151–

19Dawson County, MTMT8,692139–

20Fergus County, MTMT11,825139–

21Stillwater County, MTMT9,445133–

22Phillips County, MTMT4,203103–

23Madison County, MTMT10,02682–

24Deer Lodge County, MTMT9,70981–

25Beaverhead County, MTMT10,04368–

26Mineral County, MTMT5,18563–

27Valley County, MTMT7,38563–

28Glacier County, MTMT13,46362–

29Richland County, MTMT11,37752–

30Teton County, MTMT6,49650–

31Roosevelt County, MTMT10,24250–

32Fallon County, MTMT2,95948–

33Hill County, MTMT16,16746–

34Toole County, MTMT5,21144–

35Prairie County, MTMT1,11240–

36Chouteau County, MTMT5,86534–

37Rosebud County, MTMT8,25330–

38Pondera County, MTMT6,07228–

39Judith Basin County, MTMT2,16228–

40Sheridan County, MTMT3,43627–

41Meagher County, MTMT2,13719–

42Blaine County, MTMT6,86016–

43Big Horn County, MTMT12,75214–

44Golden Valley County, MTMT84414–

45Garfield County, MTMT1,14813–

46Powder River County, MTMT1,78113–

47Wibaux County, MTMT88510–

48Carter County, MTMT1,3839–

49Sweet Grass County, MTMT3,7629–

50Wheatland County, MTMT2,1007–

51Daniels County, MTMT1,6125–

52Granite County, MTMT3,6585–

53Petroleum County, MTMT5484–

54McCone County, MTMT1,7203–

55Liberty County, MTMT1,9572–

56Treasure County, MTMT7281–

SHOWING 1–56 OF 56

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