RANKING · 2020 CENSUS · 56 SHOWN OF 56

Highest American population share, Montana counties · 2020

Montana counties ranked by the share of all residents who are American ancestry (2020 American Community Survey). A concentration measure: American residents as a percentage of total population. This list covers the 56 counties in Montana that qualify, ranked against each other statewide.

American ancestry: full group profile →

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SAME RANKING BYCities States Metros

RELATEDLargest American population Largest Arab population Highest Arab population share Largest Egyptian population Highest Egyptian population share Largest Iraqi population

YEAR2010 2020 2024

RANKPLACESTATEPOPAMERICAN SHAREVS 2010

01Garfield County, MTMT1,14836.6%+26.1 pts

02Petroleum County, MTMT54823.3%+19.8 pts

03Wheatland County, MTMT2,10018.7%−16.5 pts

04Phillips County, MTMT4,20315.3%+5.1 pts

05Fergus County, MTMT11,82514.0%+9.8 pts

06Musselshell County, MTMT5,58213.4%+6.4 pts

07Judith Basin County, MTMT2,16213.0%+11.2 pts

08Chouteau County, MTMT5,86511.6%+9.6 pts

09McCone County, MTMT1,72011.2%−1.4 pts

10Valley County, MTMT7,3859.6%+2.8 pts

11Cascade County, MTMT85,0298.9%+4.4 pts

12Carter County, MTMT1,3838.7%+4.4 pts

13Carbon County, MTMT11,4668.3%−4.3 pts

14Stillwater County, MTMT9,4457.6%+0.7 pts

15Treasure County, MTMT7287.5%−32.7 pts

16Powell County, MTMT7,1577.4%+2.8 pts

17Sanders County, MTMT14,0627.4%+4.0 pts

18Dawson County, MTMT8,6926.9%+0.3 pts

19Powder River County, MTMT1,7816.9%−24.2 pts

20Sheridan County, MTMT3,4366.6%+1.6 pts

21Hill County, MTMT16,1676.1%+3.1 pts

22Daniels County, MTMT1,6125.9%+4.8 pts

23Yellowstone County, MTMT172,6925.9%−4.1 pts

24Teton County, MTMT6,4965.6%+1.3 pts

25Blaine County, MTMT6,8605.5%+3.5 pts

26Golden Valley County, MTMT8445.4%−3.6 pts

27Prairie County, MTMT1,1125.3%−8.8 pts

28Deer Lodge County, MTMT9,7094.9%+2.3 pts

29Granite County, MTMT3,6584.8%−3.1 pts

30Beaverhead County, MTMT10,0434.8%+1.4 pts

31Richland County, MTMT11,3774.6%−4.2 pts

32Custer County, MTMT12,0344.5%−9.7 pts

33Broadwater County, MTMT8,4934.5%+2.1 pts

34Flathead County, MTMT115,4294.4%−0.2 pts

35Lake County, MTMT33,3924.3%+0.5 pts

36Lewis and Clark County, MTMT75,3314.2%−0.9 pts

37Fallon County, MTMT2,9594.2%+3.8 pts

38Wibaux County, MTMT8854.0%−8.1 pts

39Mineral County, MTMT5,1853.8%+0.8 pts

40Gallatin County, MTMT128,7403.8%+0.3 pts

41Jefferson County, MTMT13,3293.6%−0.6 pts

42Missoula County, MTMT123,5133.5%−1.9 pts

43Lincoln County, MTMT22,3283.5%+0.2 pts

44Ravalli County, MTMT48,5823.5%−4.9 pts

45Pondera County, MTMT6,0723.4%−2.2 pts

46Toole County, MTMT5,2113.3%−0.3 pts

47Rosebud County, MTMT8,2533.0%−22.0 pts

48Madison County, MTMT10,0262.9%+0.1 pts

49Sweet Grass County, MTMT3,7622.7%−10.3 pts

50Liberty County, MTMT1,9572.6%+1.2 pts

51Park County, MTMT18,2142.6%−4.9 pts

52Meagher County, MTMT2,1372.3%−0.8 pts

53Silver Bow County, MTMT36,1182.2%−0.9 pts

54Roosevelt County, MTMT10,2421.8%+0.5 pts

55Glacier County, MTMT13,4631.6%+0.2 pts

56Big Horn County, MTMT12,7521.5%−10.6 pts

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UPDATED 2026-08-08 · DATA: US CENSUS BUREAU DECENNIAL CENSUS