RANKING · 2024 ACS · 56 SHOWN OF 56

Highest Irish population share, Montana counties

Montana counties ranked by the share of all residents who are Irish ancestry (2023 American Community Survey). A concentration measure: 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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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

RANKPLACESTATEPOPIRISH SHAREVS 2000

01Silver Bow County, MTMT36,11824.8%–

02Deer Lodge County, MTMT9,70919.8%–

03Jefferson County, MTMT13,32919.0%–

04Park County, MTMT18,21418.5%–

05Madison County, MTMT10,02618.1%–

06Meagher County, MTMT2,13716.7%–

07Wheatland County, MTMT2,10016.5%–

08Broadwater County, MTMT8,49316.4%–

09Lewis and Clark County, MTMT75,33115.9%–

10Judith Basin County, MTMT2,16215.4%–

11Missoula County, MTMT123,51315.3%–

12Powell County, MTMT7,15715.0%–

13Phillips County, MTMT4,20315.0%–

14Prairie County, MTMT1,11214.6%–

15Garfield County, MTMT1,14814.6%–

16Beaverhead County, MTMT10,04314.4%–

17Dawson County, MTMT8,69214.1%–

18Carbon County, MTMT11,46614.0%–

19Stillwater County, MTMT9,44514.0%–

20Gallatin County, MTMT128,74013.7%–

21Toole County, MTMT5,21113.6%–

22Flathead County, MTMT115,42913.3%–

23Yellowstone County, MTMT172,69213.2%–

24Custer County, MTMT12,03413.0%–

25Cascade County, MTMT85,02912.8%–

26Carter County, MTMT1,38312.7%–

27Wibaux County, MTMT88512.5%–

28Sanders County, MTMT14,06212.5%–

29Teton County, MTMT6,49612.4%–

30Ravalli County, MTMT48,58212.4%–

31Liberty County, MTMT1,95712.2%–

32Treasure County, MTMT72812.0%–

33Granite County, MTMT3,65811.9%–

34Mineral County, MTMT5,18511.8%–

35Lincoln County, MTMT22,32811.5%–

36Musselshell County, MTMT5,58211.4%–

37Petroleum County, MTMT54811.2%–

38Sheridan County, MTMT3,43611.2%–

39Lake County, MTMT33,39211.1%–

40Daniels County, MTMT1,61211.0%–

41Richland County, MTMT11,37710.6%–

42Fergus County, MTMT11,82510.5%–

43McCone County, MTMT1,7209.8%–

44Sweet Grass County, MTMT3,7629.6%–

45Powder River County, MTMT1,7819.4%–

46Fallon County, MTMT2,9599.3%–

47Pondera County, MTMT6,0728.9%–

48Rosebud County, MTMT8,2538.6%–

49Valley County, MTMT7,3858.5%–

50Golden Valley County, MTMT8447.7%–

51Chouteau County, MTMT5,8657.1%–

52Hill County, MTMT16,1676.5%–

53Glacier County, MTMT13,4635.4%–

54Blaine County, MTMT6,8604.2%–

55Roosevelt County, MTMT10,2423.8%–

56Big Horn County, MTMT12,7523.7%–

SHOWING 1–56 OF 56

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