RANKING · 2020 CENSUS · 56 SHOWN OF 56

Largest foreign-born population, Montana counties · 2020

Montana counties with the most residents born outside the United States, as of the 2020 American Community Survey. Ranked by number of people, not share. This list covers the 56 counties in Montana that qualify, ranked against each other statewide.

MontanaAll states All rankings

SAME RANKING BYCities States Metros

YEAR2010 2020 2024

RANKPLACESTATEPOPFOREIGN-BORN POPULATIONVS 2010

01Gallatin County, MTMT128,7403,823+40%

02Missoula County, MTMT123,5133,510+34%

03Yellowstone County, MTMT172,6923,203+30%

04Flathead County, MTMT115,4292,856+56%

05Cascade County, MTMT85,0291,578−11%

06Lewis and Clark County, MTMT75,3311,079−15%

07Ravalli County, MTMT48,582996+48%

08Lincoln County, MTMT22,328698+61%

09Silver Bow County, MTMT36,118690−5%

10Lake County, MTMT33,392678+16%

11Park County, MTMT18,214443−4%

12Richland County, MTMT11,377297+55%

13Madison County, MTMT10,026286−16%

14Fergus County, MTMT11,825263+137%

15Custer County, MTMT12,034230+78%

16Glacier County, MTMT13,463221+19%

17Sanders County, MTMT14,062210+27%

18Hill County, MTMT16,167200−15%

19Jefferson County, MTMT13,329183+24%

20Roosevelt County, MTMT10,242157+124%

21Deer Lodge County, MTMT9,709156+71%

22Toole County, MTMT5,211146−25%

23Rosebud County, MTMT8,253134+120%

24Dawson County, MTMT8,692130+217%

25Phillips County, MTMT4,203121+246%

26Musselshell County, MTMT5,582117+6%

27Carbon County, MTMT11,466112−48%

28Beaverhead County, MTMT10,043106−55%

29Pondera County, MTMT6,07298−30%

30Broadwater County, MTMT8,49397+155%

31Chouteau County, MTMT5,86585−2%

32Powell County, MTMT7,15781+8%

33Valley County, MTMT7,38580−40%

34Sheridan County, MTMT3,43676+38%

35Stillwater County, MTMT9,44574−35%

36Big Horn County, MTMT12,75271−17%

37Meagher County, MTMT2,13765−4%

38Teton County, MTMT6,49663−55%

39Prairie County, MTMT1,11253+489%

40Fallon County, MTMT2,95950+9%

41Mineral County, MTMT5,18547+2%

42Blaine County, MTMT6,86043+34%

43Granite County, MTMT3,65831+63%

44Wheatland County, MTMT2,10031–

45McCone County, MTMT1,72029+383%

46Daniels County, MTMT1,61228+0%

47Sweet Grass County, MTMT3,76228−65%

48Powder River County, MTMT1,78126+333%

49Wibaux County, MTMT88522+47%

50Golden Valley County, MTMT84417+1600%

51Judith Basin County, MTMT2,16215−38%

52Petroleum County, MTMT54812–

53Liberty County, MTMT1,95710−83%

54Carter County, MTMT1,3833−25%

55Garfield County, MTMT1,1480−100%

56Treasure County, MTMT7280−100%

SHOWING 1–56 OF 56

Download CSV (full list, 56 rows)

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