RANKING · 2010 CENSUS · 56 SHOWN OF 56

Largest American population, Montana counties · 2010

Montana counties ranked by the number of residents who are American ancestry, from the 2010 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. The median across all 56 is 343.

American ancestry: full group profile →

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SAME RANKING BYCities States Metros

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

YEAR2010 2020 2024

RANKPLACESTATEPOPAMERICAN POPULATIONVS –

01Yellowstone County, MTMT172,69214,363–

02Missoula County, MTMT123,5135,764–

03Flathead County, MTMT115,4294,106–

04Cascade County, MTMT85,0293,662–

05Ravalli County, MTMT48,5823,338–

06Lewis and Clark County, MTMT75,3313,138–

07Gallatin County, MTMT128,7403,073–

08Rosebud County, MTMT8,2532,280–

09Custer County, MTMT12,0341,647–

10Big Horn County, MTMT12,7521,537–

11Carbon County, MTMT11,4661,257–

12Park County, MTMT18,2141,172–

13Lake County, MTMT33,3921,093–

14Silver Bow County, MTMT36,1181,065–

15Richland County, MTMT11,377831–

16Wheatland County, MTMT2,100745–

17Lincoln County, MTMT22,328646–

18Stillwater County, MTMT9,445619–

19Dawson County, MTMT8,692583–

20Powder River County, MTMT1,781515–

21Valley County, MTMT7,385497–

22Hill County, MTMT16,167484–

23Sweet Grass County, MTMT3,762482–

24Fergus County, MTMT11,825479–

25Jefferson County, MTMT13,329466–

26Phillips County, MTMT4,203425–

27Sanders County, MTMT14,062379–

28Pondera County, MTMT6,072343–

29Treasure County, MTMT728341–

30Powell County, MTMT7,157330–

31Beaverhead County, MTMT10,043315–

32Musselshell County, MTMT5,582305–

33Teton County, MTMT6,496265–

34Deer Lodge County, MTMT9,709241–

35Granite County, MTMT3,658241–

36Madison County, MTMT10,026218–

37McCone County, MTMT1,720217–

38Toole County, MTMT5,211186–

39Glacier County, MTMT13,463182–

40Sheridan County, MTMT3,436175–

41Prairie County, MTMT1,112154–

42Roosevelt County, MTMT10,242131–

43Garfield County, MTMT1,148129–

44Wibaux County, MTMT885129–

45Blaine County, MTMT6,860128–

46Mineral County, MTMT5,185126–

47Broadwater County, MTMT8,493124–

48Chouteau County, MTMT5,865114–

49Golden Valley County, MTMT84473–

50Meagher County, MTMT2,13764–

51Carter County, MTMT1,38356–

52Judith Basin County, MTMT2,16234–

53Liberty County, MTMT1,95732–

54Petroleum County, MTMT54821–

55Daniels County, MTMT1,61219–

56Fallon County, MTMT2,95910–

SHOWING 1–56 OF 56

Download CSV (full list, 56 rows)

UPDATED 2026-09-11 · DATA: US CENSUS BUREAU DECENNIAL CENSUS