RANKING · 2024 ACS · 27 SHOWN OF 27

Highest South American population share, Montana counties

Montana counties ranked by the share of all residents who are South American origin (2024 American Community Survey). A concentration measure: South American residents as a percentage of total population. This list covers the 27 counties in Montana that qualify, ranked against each other statewide. The median across all 27 is 0.2%. Biggest climber in the top 100 since 2020: Lincoln County, MT, up 11 places to #9.

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SAME RANKING BYCities States Metros

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

YEAR2010 2020 2024

RANKPLACESTATEPOPSOUTH AMERICAN SHAREVS 2010

01▲4Park County, MTMT18,2140.9%–

02Madison County, MTMT10,0260.7%+0.3 pts

03▲8Gallatin County, MTMT128,7400.7%+0.5 pts

04▼1Golden Valley County, MTMT8440.7%–

05▲1Missoula County, MTMT123,5130.6%+0.4 pts

06Rosebud County, MTMT8,2530.5%–

07▼6Jefferson County, MTMT13,3290.4%–

08▲10Lake County, MTMT33,3920.2%+0.2 pts

09▲11Lincoln County, MTMT22,3280.2%+0.2 pts

10▼1Toole County, MTMT5,2110.2%–

11Richland County, MTMT11,3770.2%–

12▼2Yellowstone County, MTMT172,6920.2%+0.1 pts

13▲2Cascade County, MTMT85,0290.2%+0.1 pts

14Valley County, MTMT7,3850.2%–

15▼2Carbon County, MTMT11,4660.2%+0.1 pts

16▼8Ravalli County, MTMT48,5820.2%+0.1 pts

17▼5Lewis and Clark County, MTMT75,3310.2%+0.1 pts

18▼4Flathead County, MTMT115,4290.2%0.0 pts

19Powell County, MTMT7,1570.2%–

20▼3Roosevelt County, MTMT10,2420.1%−0.1 pts

21Fergus County, MTMT11,8250.1%–

22Hill County, MTMT16,1670.1%−0.2 pts

23Sheridan County, MTMT3,4360.1%–

24Big Horn County, MTMT12,7520.1%–

25Meagher County, MTMT2,1370.0%−0.9 pts

26Teton County, MTMT6,4960.0%–

27Silver Bow County, MTMT36,1180.0%–

SHOWING 1–27 OF 27

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