RANKING · 2020 CENSUS · 21 SHOWN OF 21

Largest South American population, Montana counties · 2020

Montana counties ranked by the number of residents who are South American origin, from the 2020 American Community Survey detailed-origin tables. Each list covers the full eligible universe; download the complete data as CSV. This list covers the 21 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 POPULATIONVS 2010

01Yellowstone County, MTMT172,692419+144%

02Missoula County, MTMT123,513346+81%

03Gallatin County, MTMT128,740267+44%

04Flathead County, MTMT115,429155−2%

05Jefferson County, MTMT13,329153–

06Lewis and Clark County, MTMT75,331143+175%

07Ravalli County, MTMT48,582122+455%

08Cascade County, MTMT85,029112+38%

09Madison County, MTMT10,02696+231%

10Park County, MTMT18,21486–

11Granite County, MTMT3,65836–

12Dawson County, MTMT8,69225–

13Carbon County, MTMT11,46620+567%

14Lake County, MTMT33,39216+167%

15Toole County, MTMT5,21113–

16Beaverhead County, MTMT10,04310+233%

17Golden Valley County, MTMT8449–

18Roosevelt County, MTMT10,2429−65%

19Lincoln County, MTMT22,3286−54%

20Chouteau County, MTMT5,8653–

21Fergus County, MTMT11,8253–

SHOWING 1–21 OF 21

Download CSV (full list, 21 rows)

UPDATED 2026-07-15 · DATA: US CENSUS BUREAU DECENNIAL CENSUS