RANKING · 2020 CENSUS · 53 SHOWN OF 53

Highest Mexican population share, Montana counties · 2020

Montana counties ranked by the share of all residents who are Mexican origin (2020 American Community Survey). A concentration measure: Mexican residents as a percentage of total population. This list covers the 53 counties in Montana that qualify, ranked against each other statewide. The median across all 53 is 2.2%.

Mexican Americans: full group profile →

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SAME RANKING BYCities States Metros

RELATEDLargest Mexican population Largest Puerto Rican population Highest Puerto Rican population share Largest Cuban population Highest Cuban population share Largest Dominican population

YEAR2010 2020 2024

RANKPLACESTATEPOPMEXICAN SHAREVS 2010

01Wibaux County, MTMT8856.5%+5.2 pts

02Big Horn County, MTMT12,7525.9%+2.6 pts

03Golden Valley County, MTMT8445.5%–

04Richland County, MTMT11,3775.3%+2.8 pts

05Rosebud County, MTMT8,2534.6%+1.7 pts

06Yellowstone County, MTMT172,6924.3%+0.7 pts

07Sheridan County, MTMT3,4364.0%+3.7 pts

08Beaverhead County, MTMT10,0434.0%+0.8 pts

09McCone County, MTMT1,7203.8%–

10Lake County, MTMT33,3923.6%+1.1 pts

11Powder River County, MTMT1,7813.4%+1.1 pts

12Meagher County, MTMT2,1373.4%−0.4 pts

13Sweet Grass County, MTMT3,7623.3%+2.6 pts

14Judith Basin County, MTMT2,1623.3%–

15Silver Bow County, MTMT36,1183.1%+0.4 pts

16Cascade County, MTMT85,0293.1%+0.9 pts

17Phillips County, MTMT4,2033.0%+2.3 pts

18Custer County, MTMT12,0342.8%+1.3 pts

19Glacier County, MTMT13,4632.6%+1.0 pts

20Deer Lodge County, MTMT9,7092.5%+0.8 pts

21Lewis and Clark County, MTMT75,3312.5%+0.9 pts

22Hill County, MTMT16,1672.5%+1.3 pts

23Gallatin County, MTMT128,7402.5%+0.4 pts

24Roosevelt County, MTMT10,2422.5%+1.6 pts

25Blaine County, MTMT6,8602.3%+1.8 pts

26Ravalli County, MTMT48,5822.3%+0.2 pts

27Park County, MTMT18,2142.2%+0.9 pts

28Missoula County, MTMT123,5132.1%+0.7 pts

29Musselshell County, MTMT5,5822.1%+0.5 pts

30Mineral County, MTMT5,1852.0%+0.1 pts

31Broadwater County, MTMT8,4932.0%+1.7 pts

32Stillwater County, MTMT9,4452.0%+1.0 pts

33Carbon County, MTMT11,4662.0%+0.5 pts

34Flathead County, MTMT115,4291.9%+0.4 pts

35Lincoln County, MTMT22,3281.7%+0.3 pts

36Sanders County, MTMT14,0621.7%+0.8 pts

37Madison County, MTMT10,0261.7%+0.2 pts

38Wheatland County, MTMT2,1001.7%–

39Toole County, MTMT5,2111.6%−0.7 pts

40Powell County, MTMT7,1571.6%+0.4 pts

41Prairie County, MTMT1,1121.5%+1.2 pts

42Fergus County, MTMT11,8251.2%−0.1 pts

43Dawson County, MTMT8,6921.2%+0.6 pts

44Jefferson County, MTMT13,3291.1%−0.1 pts

45Fallon County, MTMT2,9590.9%−0.8 pts

46Valley County, MTMT7,3850.7%+0.2 pts

47Pondera County, MTMT6,0720.6%−0.5 pts

48Daniels County, MTMT1,6120.6%+0.3 pts

49Chouteau County, MTMT5,8650.4%−0.4 pts

50Treasure County, MTMT7280.3%−10.4 pts

51Granite County, MTMT3,6580.3%−0.1 pts

52Garfield County, MTMT1,1480.3%–

53Teton County, MTMT6,4960.2%−1.2 pts

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