RANKING · 2024 ACS · 52 SHOWN OF 52

Highest Mexican population share, Montana counties

Montana counties ranked by the share of all residents who are Mexican origin (2024 American Community Survey). A concentration measure: Mexican residents as a percentage of total population. This list covers the 52 counties in Montana that qualify, ranked against each other statewide. The median across all 52 is 2.4%. Biggest climber in the top 100 since 2020: Treasure County, MT, up 46 places to #4.

Mexican Americans: full group profile →

MontanaAll states All rankings

SAME RANKING BYCities States Metros

YEAR2010 2020 2024

RANKPLACESTATEPOPMEXICAN SHAREVS 2010

01Wibaux County, MTMT8857.7%+6.5 pts

02▲12Judith Basin County, MTMT2,1625.7%–

03▲3Yellowstone County, MTMT172,6924.8%+1.2 pts

04▲46Treasure County, MTMT7284.2%−6.5 pts

05▲34Toole County, MTMT5,2114.1%+1.8 pts

06▼2Richland County, MTMT11,3773.9%+1.5 pts

07▲8Silver Bow County, MTMT36,1183.8%+1.0 pts

08Beaverhead County, MTMT10,0433.8%+0.7 pts

09▼2Sheridan County, MTMT3,4363.5%+3.2 pts

10Lake County, MTMT33,3923.2%+0.8 pts

11▲5Cascade County, MTMT85,0293.2%+1.0 pts

12▲18Mineral County, MTMT5,1853.0%+1.1 pts

13▲16Musselshell County, MTMT5,5823.0%+1.5 pts

14▲14Missoula County, MTMT123,5133.0%+1.6 pts

15▼10Rosebud County, MTMT8,2532.9%0.0 pts

16▲4Deer Lodge County, MTMT9,7092.9%+1.1 pts

17▲14Broadwater County, MTMT8,4932.8%+2.5 pts

18▲19Madison County, MTMT10,0262.8%+1.4 pts

19▲4Gallatin County, MTMT128,7402.8%+0.7 pts

20▼2Custer County, MTMT12,0342.8%+1.2 pts

21▼18Golden Valley County, MTMT8442.7%–

22▼20Big Horn County, MTMT12,7522.6%−0.7 pts

23▲15Wheatland County, MTMT2,1002.5%–

24▼3Lewis and Clark County, MTMT75,3312.4%+0.8 pts

25▼6Glacier County, MTMT13,4632.4%+0.9 pts

26Carter County, MTMT1,3832.4%+1.9 pts

27▼1Ravalli County, MTMT48,5822.3%+0.2 pts

28▼6Hill County, MTMT16,1672.2%+1.0 pts

29▲4Carbon County, MTMT11,4662.2%+0.7 pts

30▲10Powell County, MTMT7,1572.1%+0.9 pts

31▼6Blaine County, MTMT6,8602.1%+1.6 pts

32▲15Pondera County, MTMT6,0722.1%+0.9 pts

33▼6Park County, MTMT18,2141.9%+0.7 pts

34Flathead County, MTMT115,4291.9%+0.4 pts

35▼11Roosevelt County, MTMT10,2421.9%+1.1 pts

36▲10Valley County, MTMT7,3851.9%+1.3 pts

37▲5Fergus County, MTMT11,8251.9%+0.6 pts

38▲11Chouteau County, MTMT5,8651.9%+1.1 pts

39▼7Stillwater County, MTMT9,4451.9%+0.9 pts

40▼5Lincoln County, MTMT22,3281.7%+0.3 pts

41▲2Dawson County, MTMT8,6921.7%+1.2 pts

42▲2Jefferson County, MTMT13,3291.6%+0.3 pts

43▼7Sanders County, MTMT14,0621.5%+0.6 pts

44▼32Meagher County, MTMT2,1371.5%−2.3 pts

45▲3Daniels County, MTMT1,6121.3%+1.0 pts

46▼35Powder River County, MTMT1,7811.3%−1.0 pts

47▼34Sweet Grass County, MTMT3,7621.1%+0.4 pts

48▲5Teton County, MTMT6,4960.7%−0.8 pts

49▼32Phillips County, MTMT4,2030.5%−0.2 pts

50▲1Granite County, MTMT3,6580.3%0.0 pts

51▼42McCone County, MTMT1,7200.2%–

52▼7Fallon County, MTMT2,9590.0%−1.6 pts

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES