RANKING · 2010 CENSUS · 56 SHOWN OF 56

Largest Scotch-Irish population, Montana counties · 2010

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, MTMT123,5133,185–

02Yellowstone County, MTMT172,6923,052–

03Flathead County, MTMT115,4292,600–

04Cascade County, MTMT85,0292,193–

05Gallatin County, MTMT128,7401,982–

06Lewis and Clark County, MTMT75,3311,968–

07Ravalli County, MTMT48,5821,401–

08Lake County, MTMT33,3921,110–

09Silver Bow County, MTMT36,118853–

10Lincoln County, MTMT22,328580–

11Park County, MTMT18,214526–

12Sanders County, MTMT14,062394–

13Madison County, MTMT10,026362–

14Custer County, MTMT12,034347–

15Jefferson County, MTMT13,329331–

16Deer Lodge County, MTMT9,709330–

17Fergus County, MTMT11,825301–

18Carbon County, MTMT11,466272–

19Dawson County, MTMT8,692267–

20Richland County, MTMT11,377198–

21Stillwater County, MTMT9,445197–

22Hill County, MTMT16,167180–

23Powell County, MTMT7,157172–

24Beaverhead County, MTMT10,043159–

25Pondera County, MTMT6,072157–

26Rosebud County, MTMT8,253149–

27Fallon County, MTMT2,959148–

28Mineral County, MTMT5,185146–

29Big Horn County, MTMT12,752132–

30Meagher County, MTMT2,137119–

31Granite County, MTMT3,658117–

32Broadwater County, MTMT8,493116–

33Valley County, MTMT7,385116–

34Musselshell County, MTMT5,582113–

35Phillips County, MTMT4,203112–

36Teton County, MTMT6,496104–

37Toole County, MTMT5,211103–

38Judith Basin County, MTMT2,16283–

39Glacier County, MTMT13,46374–

40Wheatland County, MTMT2,10072–

41Chouteau County, MTMT5,86571–

42Sweet Grass County, MTMT3,76259–

43Roosevelt County, MTMT10,24257–

44Blaine County, MTMT6,86053–

45Prairie County, MTMT1,11251–

46Carter County, MTMT1,38338–

47Sheridan County, MTMT3,43636–

48Garfield County, MTMT1,14832–

49McCone County, MTMT1,72031–

50Powder River County, MTMT1,78130–

51Treasure County, MTMT72828–

52Golden Valley County, MTMT84422–

53Liberty County, MTMT1,95715–

54Wibaux County, MTMT88514–

55Petroleum County, MTMT5489–

56Daniels County, MTMT1,6126–

SHOWING 1–56 OF 56

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