Ranking of Montana Counties By Percentage of Population with Other Groups Ancestry in 2021
Updated on April 16, 2025.
Based on the US Census ACS-5Yrs estimates, in 2021, there were 181.26K people in Montana with Other Groups ancestry (16.82% of Montana population). Among all Montana counties, Big Horn County had the highest percentage of its population with Other Groups ancestry (66.80%), followed by Glacier County (66.72%), and Roosevelt County (62.62%).
The chart and table below shows the top 10 counties with high percentage of its population having Other Groups ancestry.
You can see similar information for other states and for other ancestry groups in Montana.
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Related Topics: Montana ACS-5Yrs Estimates, 2021 Topic List.
Data Source: US Census Bureau.
Ranking of Montana Counties By Percentage of Population with Other Groups Ancestry in 2021
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| Rank | County | Percentage of Pop. (%) |
|---|---|---|
| 1 | Big Horn County | 66.80 |
| 2 | Glacier County | 66.72 |
| 3 | Roosevelt County | 62.62 |
| 4 | Blaine County | 47.11 |
| 5 | Rosebud County | 39.40 |
| 6 | Lake County | 29.17 |
| 7 | Hill County | 20.74 |
| 8 | Pondera County | 19.15 |
| 9 | Phillips County | 18.99 |
| 10 | Chouteau County | 18.05 |
| 11 | Toole County | 17.61 |
| 12 | Yellowstone County | 17.59 |
| 13 | Powell County | 17.25 |
| 14 | Cascade County | 16.61 |
| 15 | Lincoln County | 15.93 |
| 16 | Beaverhead County | 14.84 |
| 17 | Wibaux County | 14.64 |
| 18 | Silver Bow County | 14.11 |
| 19 | Deer Lodge County | 13.90 |
| 20 | Ravalli County | 13.78 |
| 21 | Madison County | 13.73 |
| 22 | Gallatin County | 13.57 |
| 23 | Stillwater County | 13.52 |
| 24 | Valley County | 13.44 |
| 25 | Lewis and Clark County | 13.42 |
| 26 | Missoula County | 13.37 |
| 27 | Broadwater County | 13.21 |
| 28 | Jefferson County | 12.65 |
| 29 | Sanders County | 12.43 |
| 30 | McCone County | 12.41 |
| 31 | Flathead County | 12.22 |
| 32 | Powder River County | 12.17 |
| 33 | Prairie County | 12.14 |
| 34 | Custer County | 12.07 |
| 35 | Petroleum County | 11.52 |
| 36 | Park County | 11.26 |
| 37 | Musselshell County | 11.10 |
| 38 | Richland County | 10.77 |
| 39 | Dawson County | 10.70 |
| 40 | Carbon County | 10.17 |
| 41 | Sheridan County | 10.05 |
| 42 | Golden Valley County | 9.76 |
| 43 | Mineral County | 9.38 |
| 44 | Fallon County | 8.30 |
| 45 | Fergus County | 8.22 |
| 46 | Wheatland County | 8.16 |
| 47 | Granite County | 8.07 |
| 48 | Meagher County | 7.92 |
| 48 | Teton County | 7.92 |
| 49 | Judith Basin County | 7.59 |
| 50 | Sweet Grass County | 7.15 |
| 51 | Daniels County | 5.75 |
| 52 | Treasure County | 4.04 |
| 53 | Liberty County | 3.55 |
| 54 | Carter County | 2.15 |
| 55 | Garfield County | 1.44 |
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