RANKING · 2010 CENSUS · 56 SHOWN OF 56

Highest American population share, Montana counties · 2010

Montana counties ranked by the share of all residents who are American ancestry (2010 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 –

01Treasure County, MTMT72840.2%–

02Wheatland County, MTMT2,10035.2%–

03Powder River County, MTMT1,78131.0%–

04Rosebud County, MTMT8,25325.0%–

05Custer County, MTMT12,03414.3%–

06Prairie County, MTMT1,11214.1%–

07Sweet Grass County, MTMT3,76213.0%–

08McCone County, MTMT1,72012.7%–

09Carbon County, MTMT11,46612.6%–

10Big Horn County, MTMT12,75212.1%–

11Wibaux County, MTMT88512.1%–

12Garfield County, MTMT1,14810.5%–

13Phillips County, MTMT4,20310.1%–

14Yellowstone County, MTMT172,69210.0%–

15Golden Valley County, MTMT8449.0%–

16Richland County, MTMT11,3778.7%–

17Ravalli County, MTMT48,5828.3%–

18Granite County, MTMT3,6587.9%–

19Park County, MTMT18,2147.4%–

20Musselshell County, MTMT5,5827.0%–

21Stillwater County, MTMT9,4456.9%–

22Valley County, MTMT7,3856.8%–

23Dawson County, MTMT8,6926.5%–

24Pondera County, MTMT6,0725.6%–

25Missoula County, MTMT123,5135.4%–

26Lewis and Clark County, MTMT75,3315.1%–

27Sheridan County, MTMT3,4365.0%–

28Powell County, MTMT7,1574.7%–

29Flathead County, MTMT115,4294.6%–

30Cascade County, MTMT85,0294.5%–

31Carter County, MTMT1,3834.3%–

32Teton County, MTMT6,4964.3%–

33Jefferson County, MTMT13,3294.2%–

34Fergus County, MTMT11,8254.2%–

35Lake County, MTMT33,3923.8%–

36Toole County, MTMT5,2113.6%–

37Petroleum County, MTMT5483.5%–

38Gallatin County, MTMT128,7403.5%–

39Beaverhead County, MTMT10,0433.4%–

40Sanders County, MTMT14,0623.3%–

41Lincoln County, MTMT22,3283.3%–

42Meagher County, MTMT2,1373.2%–

43Silver Bow County, MTMT36,1183.2%–

44Hill County, MTMT16,1673.0%–

45Mineral County, MTMT5,1853.0%–

46Madison County, MTMT10,0262.9%–

47Deer Lodge County, MTMT9,7092.6%–

48Broadwater County, MTMT8,4932.3%–

49Blaine County, MTMT6,8602.0%–

50Chouteau County, MTMT5,8652.0%–

51Judith Basin County, MTMT2,1621.7%–

52Liberty County, MTMT1,9571.4%–

53Glacier County, MTMT13,4631.4%–

54Roosevelt County, MTMT10,2421.3%–

55Daniels County, MTMT1,6121.2%–

56Fallon County, MTMT2,9590.4%–

SHOWING 1–56 OF 56

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UPDATED 2026-07-15 · DATA: US CENSUS BUREAU DECENNIAL CENSUS