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.

South Americans: full group profile →

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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

01Park County, MTMT18,2140.9%–

02Madison County, MTMT10,0260.7%+0.3 pts

03Gallatin County, MTMT128,7400.7%+0.5 pts

04Golden Valley County, MTMT8440.7%–

05Missoula County, MTMT123,5130.6%+0.4 pts

06Rosebud County, MTMT8,2530.5%–

07Jefferson County, MTMT13,3290.4%–

08Lake County, MTMT33,3920.2%+0.2 pts

09Lincoln County, MTMT22,3280.2%+0.2 pts

10Toole County, MTMT5,2110.2%–

11Richland County, MTMT11,3770.2%–

12Yellowstone County, MTMT172,6920.2%+0.1 pts

13Cascade County, MTMT85,0290.2%+0.1 pts

14Valley County, MTMT7,3850.2%–

15Carbon County, MTMT11,4660.2%+0.1 pts

16Ravalli County, MTMT48,5820.2%+0.1 pts

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

18Flathead County, MTMT115,4290.2%−0.0 pts

19Powell County, MTMT7,1570.2%–

20Roosevelt 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 2026-08-08 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES