RANKING · 2010 CENSUS · 51 SHOWN OF 51

Largest Welsh population, Montana counties · 2010

Montana counties ranked by the number of residents who are Welsh ancestry, from the 2023 American Community Survey detailed-origin tables. Each list covers the full eligible universe; download the complete data as CSV. This list covers the 51 counties in Montana that qualify, ranked against each other statewide.

MontanaAll states All rankings

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

RANKPLACESTATEPOPWELSH POPULATIONVS 2000

01Yellowstone County, MTMT172,6921,497–

02Gallatin County, MTMT128,7401,385–

03Flathead County, MTMT115,429983–

04Missoula County, MTMT123,513880–

05Ravalli County, MTMT48,582745–

06Cascade County, MTMT85,029664–

07Lewis and Clark County, MTMT75,331629–

08Silver Bow County, MTMT36,118461–

09Lincoln County, MTMT22,328279–

10Beaverhead County, MTMT10,043229–

11Lake County, MTMT33,392211–

12Park County, MTMT18,214162–

13Powell County, MTMT7,157159–

14Jefferson County, MTMT13,329158–

15Custer County, MTMT12,034132–

16Carbon County, MTMT11,466131–

17Deer Lodge County, MTMT9,709115–

18Pondera County, MTMT6,07296–

19Hill County, MTMT16,16794–

20Stillwater County, MTMT9,44588–

21Sanders County, MTMT14,06282–

22Big Horn County, MTMT12,75281–

23Chouteau County, MTMT5,86581–

24Glacier County, MTMT13,46380–

25Fergus County, MTMT11,82576–

26Mineral County, MTMT5,18572–

27Madison County, MTMT10,02671–

28Wheatland County, MTMT2,10061–

29Musselshell County, MTMT5,58252–

30Granite County, MTMT3,65844–

31Toole County, MTMT5,21144–

32Richland County, MTMT11,37742–

33Teton County, MTMT6,49641–

34Sweet Grass County, MTMT3,76240–

35Valley County, MTMT7,38538–

36Dawson County, MTMT8,69236–

37Broadwater County, MTMT8,49333–

38Carter County, MTMT1,38323–

39Meagher County, MTMT2,13723–

40Sheridan County, MTMT3,43623–

41Rosebud County, MTMT8,25322–

42Judith Basin County, MTMT2,16220–

43McCone County, MTMT1,72018–

44Fallon County, MTMT2,95912–

45Wibaux County, MTMT88512–

46Blaine County, MTMT6,86010–

47Powder River County, MTMT1,7818–

48Phillips County, MTMT4,2037–

49Prairie County, MTMT1,1126–

50Daniels County, MTMT1,6125–

51Roosevelt County, MTMT10,2422–

SHOWING 1–51 OF 51

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