Ranking of Montana Counties By Percentage of Population with American Ancestry in 2021
Updated on April 16, 2025.
Based on the US Census ACS-5Yrs estimates, in 2021, there were 52.83K people in Montana with American ancestry (4.90% of Montana population). Among all Montana counties, Garfield County had the highest percentage of its population with American ancestry (33.03%), followed by Petroleum County (23.50%), and Wheatland County (22.19%).
The chart and table below shows the top 10 counties with high percentage of its population having American 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 American Ancestry in 2021
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| Rank | County | Percentage of Pop. (%) |
|---|---|---|
| 1 | Garfield County | 33.03 |
| 2 | Petroleum County | 23.50 |
| 3 | Wheatland County | 22.19 |
| 4 | Phillips County | 15.64 |
| 5 | Judith Basin County | 15.12 |
| 6 | Musselshell County | 13.98 |
| 7 | Fergus County | 13.28 |
| 8 | Chouteau County | 11.04 |
| 9 | Valley County | 10.47 |
| 10 | McCone County | 9.81 |
| 11 | Sanders County | 9.58 |
| 12 | Carter County | 8.82 |
| 13 | Daniels County | 8.63 |
| 14 | Cascade County | 8.51 |
| 15 | Carbon County | 6.94 |
| 16 | Teton County | 6.48 |
| 17 | Hill County | 6.27 |
| 18 | Powell County | 6.24 |
| 19 | Golden Valley County | 6.22 |
| 20 | Sheridan County | 6.13 |
| 21 | Treasure County | 6.06 |
| 22 | Beaverhead County | 5.81 |
| 23 | Deer Lodge County | 5.75 |
| 24 | Richland County | 5.63 |
| 25 | Powder River County | 5.34 |
| 26 | Granite County | 5.31 |
| 26 | Lake County | 5.31 |
| 27 | Lewis and Clark County | 5.15 |
| 28 | Blaine County | 4.99 |
| 29 | Stillwater County | 4.96 |
| 30 | Yellowstone County | 4.55 |
| 31 | Flathead County | 4.22 |
| 32 | Broadwater County | 4.08 |
| 33 | Custer County | 3.97 |
| 34 | Gallatin County | 3.84 |
| 35 | Lincoln County | 3.79 |
| 36 | Pondera County | 3.72 |
| 37 | Jefferson County | 3.57 |
| 38 | Missoula County | 3.52 |
| 39 | Rosebud County | 3.46 |
| 40 | Ravalli County | 3.45 |
| 41 | Madison County | 3.32 |
| 42 | Mineral County | 3.25 |
| 43 | Roosevelt County | 3.12 |
| 44 | Park County | 3.06 |
| 45 | Wibaux County | 2.95 |
| 46 | Prairie County | 2.77 |
| 47 | Silver Bow County | 2.60 |
| 48 | Toole County | 2.55 |
| 49 | Liberty County | 2.47 |
| 50 | Big Horn County | 2.36 |
| 51 | Dawson County | 2.32 |
| 52 | Meagher County | 1.76 |
| 53 | Sweet Grass County | 1.60 |
| 54 | Glacier County | 1.27 |
| 55 | Fallon County | 0.46 |
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