Ranking of Montana Counties By Percentage of Population with Unclassified Ancestry in 2021
Updated on April 16, 2025.
Based on the US Census ACS-5Yrs estimates, in 2021, there were 243.21K people in Montana with Unclassified ancestry (22.56% of Montana population). Among all Montana counties, Hill County had the highest percentage of its population with Unclassified ancestry (33.26%), followed by Mineral County (31.11%), and Missoula County (29.96%).
The chart and table below shows the top 10 counties with high percentage of its population having Unclassified 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 Unclassified Ancestry in 2021
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| Rank | County | Percentage of Pop. (%) |
|---|---|---|
| 1 | Hill County | 33.26 |
| 2 | Mineral County | 31.11 |
| 3 | Missoula County | 29.96 |
| 4 | Toole County | 28.03 |
| 5 | Lincoln County | 27.86 |
| 6 | Lake County | 26.14 |
| 7 | Custer County | 25.99 |
| 8 | Silver Bow County | 25.94 |
| 9 | Carter County | 25.87 |
| 10 | Treasure County | 25.83 |
| 11 | Pondera County | 25.73 |
| 12 | Dawson County | 25.61 |
| 13 | Granite County | 24.81 |
| 14 | Golden Valley County | 24.63 |
| 15 | Ravalli County | 24.48 |
| 16 | Liberty County | 24.09 |
| 17 | Valley County | 23.86 |
| 18 | Teton County | 23.59 |
| 19 | Sheridan County | 23.14 |
| 20 | Meagher County | 22.98 |
| 21 | Deer Lodge County | 22.93 |
| 22 | Prairie County | 22.66 |
| 23 | Beaverhead County | 22.63 |
| 24 | Cascade County | 22.35 |
| 25 | Chouteau County | 22.02 |
| 26 | Gallatin County | 21.96 |
| 27 | Wibaux County | 21.81 |
| 28 | Sanders County | 21.76 |
| 29 | Stillwater County | 21.57 |
| 30 | Rosebud County | 21.41 |
| 31 | Powder River County | 21.21 |
| 32 | Richland County | 21.19 |
| 33 | Carbon County | 20.95 |
| 34 | Yellowstone County | 20.90 |
| 35 | Daniels County | 20.87 |
| 36 | Powell County | 20.55 |
| 37 | Madison County | 20.45 |
| 38 | Flathead County | 20.11 |
| 39 | Musselshell County | 19.82 |
| 40 | Fergus County | 19.79 |
| 41 | Lewis and Clark County | 19.15 |
| 42 | Jefferson County | 18.69 |
| 43 | Park County | 18.22 |
| 44 | Blaine County | 18.20 |
| 45 | Big Horn County | 18.11 |
| 46 | Broadwater County | 17.86 |
| 47 | Sweet Grass County | 17.61 |
| 48 | Phillips County | 17.34 |
| 49 | Fallon County | 15.09 |
| 50 | Petroleum County | 13.83 |
| 51 | McCone County | 13.74 |
| 52 | Judith Basin County | 13.57 |
| 53 | Roosevelt County | 12.50 |
| 54 | Garfield County | 12.14 |
| 55 | Glacier County | 11.15 |
| 56 | Wheatland County | 6.63 |
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