RANKING · 2020 CENSUS · 50 SHOWN OF 50

Largest Welsh population, Montana counties · 2020

Montana counties ranked by the number of residents who are Welsh ancestry, from the 2020 American Community Survey detailed-origin tables. Each list covers the full eligible universe; download the complete data as CSV. This list covers the 50 counties in Montana that qualify, ranked against each other statewide.

Welsh Americans: full group profile →

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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 2010

01Gallatin County, MTMT128,7401,169−16%

02Yellowstone County, MTMT172,6921,157−23%

03Lewis and Clark County, MTMT75,3311,053+67%

04Missoula County, MTMT123,513984+12%

05Cascade County, MTMT85,029919+38%

06Flathead County, MTMT115,429799−19%

07Ravalli County, MTMT48,582591−21%

08Silver Bow County, MTMT36,118473+3%

09Dawson County, MTMT8,692266+639%

10Lake County, MTMT33,392252+19%

11Madison County, MTMT10,026210+196%

12Sanders County, MTMT14,062198+141%

13Custer County, MTMT12,034181+37%

14Lincoln County, MTMT22,328143−49%

15Deer Lodge County, MTMT9,709135+17%

16Beaverhead County, MTMT10,043128−44%

17Stillwater County, MTMT9,445122+39%

18Carbon County, MTMT11,466113−14%

19Park County, MTMT18,214110−32%

20Jefferson County, MTMT13,329105−34%

21Broadwater County, MTMT8,49380+142%

22Powell County, MTMT7,15777−52%

23Richland County, MTMT11,37776+81%

24Fergus County, MTMT11,82575−1%

25Chouteau County, MTMT5,86571−12%

26Liberty County, MTMT1,95761–

27Mineral County, MTMT5,18558−19%

28Glacier County, MTMT13,46358−28%

29Sweet Grass County, MTMT3,76251+28%

30Toole County, MTMT5,21148+9%

31Rosebud County, MTMT8,25346+109%

32Teton County, MTMT6,49646+12%

33Big Horn County, MTMT12,75243−47%

34Meagher County, MTMT2,13740+74%

35Granite County, MTMT3,65839−11%

36Hill County, MTMT16,16729−69%

37Sheridan County, MTMT3,43618−22%

38Valley County, MTMT7,38518−53%

39Blaine County, MTMT6,86017+70%

40Garfield County, MTMT1,14817–

41Judith Basin County, MTMT2,16213−35%

42Carter County, MTMT1,38312−48%

43Phillips County, MTMT4,20312+71%

44Pondera County, MTMT6,07212−88%

45McCone County, MTMT1,72011−39%

46Powder River County, MTMT1,78111+38%

47Roosevelt County, MTMT10,24211+450%

48Golden Valley County, MTMT8448–

49Musselshell County, MTMT5,5826−88%

50Fallon County, MTMT2,9594−67%

SHOWING 1–50 OF 50

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

Largest Welsh population, Montana counties (2020) · CensusEasy