Ranking of Montana Counties By Net Migration in 2021
Updated on June 21, 2025.
Based on the US Census Vintage data estimates, in 2021, the Net Migration for Montana was 21.25K. Among all Montana counties, Flathead County had the highest net migration (4.16K), followed by Gallatin County (3.07K), and Yellowstone County (2.31K).
The chart below shows the top 10 counties, and the table below shows the ranking of all Montana counties.
You can see similar ranking information for related topics, and for other states. You can also see the ranking of all counties in the United States.
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Related Topics: Montana Census Vintage Data Topic List.
Data Source: US Census Bureau (Vintage), 2021 Census.
See this for other years:
Ranking of Montana Counties By Net Migration in 2021
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| Rank | County | Net Migration |
|---|---|---|
| 1 | Flathead County | 4160 |
| 2 | Gallatin County | 3065 |
| 3 | Yellowstone County | 2311 |
| 4 | Ravalli County | 2016 |
| 5 | Lewis and Clark County | 1408 |
| 6 | Missoula County | 1400 |
| 7 | Lincoln County | 1044 |
| 8 | Lake County | 942 |
| 9 | Sanders County | 651 |
| 10 | Silver Bow County | 504 |
| 11 | Broadwater County | 487 |
| 12 | Carbon County | 436 |
| 13 | Jefferson County | 414 |
| 14 | Park County | 384 |
| 15 | Madison County | 352 |
| 16 | Mineral County | 346 |
| 17 | Cascade County | 236 |
| 18 | Fergus County | 215 |
| 19 | Beaverhead County | 207 |
| 20 | Musselshell County | 205 |
| 21 | Deer Lodge County | 170 |
| 22 | Pondera County | 147 |
| 23 | Custer County | 139 |
| 24 | Powell County | 123 |
| 25 | Sweet Grass County | 69 |
| 26 | Stillwater County | 64 |
| 27 | Granite County | 60 |
| 28 | Chouteau County | 49 |
| 29 | Meagher County | 46 |
| 30 | Toole County | 43 |
| 31 | Garfield County | 41 |
| 31 | Sheridan County | 41 |
| 32 | Teton County | 38 |
| 33 | Daniels County | 34 |
| 34 | Valley County | 32 |
| 35 | Roosevelt County | 30 |
| 36 | Petroleum County | 22 |
| 37 | Prairie County | 20 |
| 38 | Judith Basin County | 19 |
| 38 | Powder River County | 19 |
| 39 | Carter County | 15 |
| 40 | Phillips County | 14 |
| 41 | Wibaux County | 12 |
| 42 | Treasure County | 10 |
| 43 | Golden Valley County | 4 |
| 44 | Glacier County | -2 |
| 45 | Dawson County | -13 |
| 46 | McCone County | -20 |
| 46 | Wheatland County | -20 |
| 47 | Blaine County | -22 |
| 48 | Liberty County | -25 |
| 49 | Fallon County | -27 |
| 50 | Hill County | -115 |
| 51 | Big Horn County | -132 |
| 52 | Rosebud County | -190 |
| 53 | Richland County | -226 |
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