RANKING · 2020 CENSUS · 21 SHOWN OF 21

Highest South American population share, Montana counties · 2020

Montana counties ranked by the share of all residents who are South American origin (2020 American Community Survey). A concentration measure: South American residents as a percentage of total population. This list covers the 21 counties in Montana that qualify, ranked against each other statewide.

South Americans: full group profile →

MontanaAll states All rankings

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

01Jefferson County, MTMT13,3291.3%–

02Madison County, MTMT10,0261.1%+0.7 pts

03Golden Valley County, MTMT8441.1%–

04Granite County, MTMT3,6581.1%–

05Park County, MTMT18,2140.5%–

06Missoula County, MTMT123,5130.3%+0.1 pts

07Dawson County, MTMT8,6920.3%–

08Ravalli County, MTMT48,5820.3%+0.2 pts

09Toole County, MTMT5,2110.3%–

10Yellowstone County, MTMT172,6920.3%+0.1 pts

11Gallatin County, MTMT128,7400.2%+0.0 pts

12Lewis and Clark County, MTMT75,3310.2%+0.1 pts

13Carbon County, MTMT11,4660.2%+0.2 pts

14Flathead County, MTMT115,4290.2%−0.0 pts

15Cascade County, MTMT85,0290.1%+0.0 pts

16Beaverhead County, MTMT10,0430.1%+0.1 pts

17Roosevelt County, MTMT10,2420.1%−0.2 pts

18Lake County, MTMT33,3920.1%+0.0 pts

19Chouteau County, MTMT5,8650.1%–

20Lincoln County, MTMT22,3280.0%−0.0 pts

21Fergus County, MTMT11,8250.0%–

SHOWING 1–21 OF 21

Download CSV (full list, 21 rows)

UPDATED 2026-08-08 · DATA: US CENSUS BUREAU DECENNIAL CENSUS