RANKING · 2010 CENSUS · 17 SHOWN OF 17

Highest South American population share, Montana counties · 2010

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 17 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

01Meagher County, MTMT2,1370.9%–

02Sweet Grass County, MTMT3,7620.6%–

03Madison County, MTMT10,0260.4%–

04Hill County, MTMT16,1670.3%–

05Roosevelt County, MTMT10,2420.3%–

06Gallatin County, MTMT128,7400.2%–

07Missoula County, MTMT123,5130.2%–

08Flathead County, MTMT115,4290.2%–

09Yellowstone County, MTMT172,6920.1%–

10Cascade County, MTMT85,0290.1%–

11Lewis and Clark County, MTMT75,3310.1%–

12Pondera County, MTMT6,0720.1%–

13Lincoln County, MTMT22,3280.1%–

14Ravalli County, MTMT48,5820.1%–

15Beaverhead County, MTMT10,0430.0%–

16Carbon County, MTMT11,4660.0%–

17Lake County, MTMT33,3920.0%–

SHOWING 1–17 OF 17

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