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 (2023 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.

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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 2000

01Park County, MTMT18,2140.9%–

02Madison County, MTMT10,0260.7%–

03Gallatin County, MTMT128,7400.7%–

04Golden Valley County, MTMT8440.7%–

05Missoula County, MTMT123,5130.6%–

06Rosebud County, MTMT8,2530.5%–

07Jefferson County, MTMT13,3290.4%–

08Lake County, MTMT33,3920.2%–

09Lincoln County, MTMT22,3280.2%–

10Toole County, MTMT5,2110.2%–

11Richland County, MTMT11,3770.2%–

12Yellowstone County, MTMT172,6920.2%–

13Cascade County, MTMT85,0290.2%–

14Valley County, MTMT7,3850.2%–

15Carbon County, MTMT11,4660.2%–

16Ravalli County, MTMT48,5820.2%–

17Lewis and Clark County, MTMT75,3310.2%–

18Flathead County, MTMT115,4290.2%–

19Powell County, MTMT7,1570.2%–

20Roosevelt County, MTMT10,2420.1%–

21Fergus County, MTMT11,8250.1%–

22Hill County, MTMT16,1670.1%–

23Sheridan County, MTMT3,4360.1%–

24Big Horn County, MTMT12,7520.1%–

25Meagher County, MTMT2,1370.0%–

26Teton County, MTMT6,4960.0%–

27Silver Bow County, MTMT36,1180.0%–

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UPDATED 2026-06-06 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES