Ranking of Montana Counties By Population with Scotch Irish Ancestry in 2021
Updated on April 16, 2025.
Based on the US Census ACS-5Yrs estimates, in 2021, there were 15.20K people in Montana with Scotch Irish ancestry. Among all Montana counties, Yellowstone County had the highest population with Scotch Irish ancestry (1.92K), followed by Missoula County (1.85K), and Gallatin County (1.63K).
The chart and table below shows the top 10 counties with high number of people with Scotch Irish 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 Population with Scotch Irish Ancestry in 2021
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| Rank | County | Population |
|---|---|---|
| 1 | Yellowstone County | 1918 |
| 2 | Missoula County | 1853 |
| 3 | Gallatin County | 1630 |
| 4 | Lewis and Clark County | 1270 |
| 5 | Flathead County | 1144 |
| 6 | Cascade County | 1126 |
| 7 | Ravalli County | 920 |
| 8 | Lake County | 588 |
| 9 | Sanders County | 569 |
| 10 | Lincoln County | 362 |
| 11 | Park County | 315 |
| 12 | Silver Bow County | 282 |
| 13 | Dawson County | 278 |
| 14 | Stillwater County | 263 |
| 15 | Carbon County | 242 |
| 16 | Jefferson County | 197 |
| 17 | Custer County | 180 |
| 18 | Madison County | 170 |
| 19 | Fergus County | 147 |
| 20 | Rosebud County | 127 |
| 21 | Mineral County | 124 |
| 22 | Valley County | 103 |
| 23 | Musselshell County | 100 |
| 24 | Broadwater County | 94 |
| 25 | Glacier County | 92 |
| 26 | Meagher County | 88 |
| 27 | Wheatland County | 83 |
| 28 | Hill County | 80 |
| 29 | Deer Lodge County | 79 |
| 30 | Teton County | 73 |
| 31 | Powell County | 65 |
| 32 | Chouteau County | 64 |
| 33 | Prairie County | 58 |
| 34 | Beaverhead County | 53 |
| 35 | Carter County | 50 |
| 36 | Richland County | 45 |
| 37 | Sweet Grass County | 44 |
| 38 | Phillips County | 39 |
| 39 | Pondera County | 36 |
| 40 | Roosevelt County | 35 |
| 41 | Sheridan County | 29 |
| 42 | Powder River County | 21 |
| 43 | Big Horn County | 20 |
| 43 | Blaine County | 20 |
| 43 | Garfield County | 20 |
| 44 | Judith Basin County | 18 |
| 45 | Fallon County | 17 |
| 46 | Daniels County | 16 |
| 47 | Golden Valley County | 13 |
| 48 | Toole County | 12 |
| 49 | Granite County | 11 |
| 50 | Petroleum County | 7 |
| 51 | Treasure County | 6 |
| 52 | Liberty County | 3 |
| 53 | McCone County | 2 |
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