Montana Net Migration Rate By County in 2021

Updated on June 21, 2025.

According to the US Census Bureau estimates, in 2021, the net migration rate per 1,000 population for Montana was 19.38. Mineral County had the highest net migration rate per 1,000 population (73.41), followed by Broadwater County (68.64), and Lincoln County (51.76). On the other hand, Rosebud County had the lowest net migration rate per 1,000 population (-23.19), followed by Richland County (-19.77), and Liberty County (-12.84).

Net migration rate for a county refers to the difference between the number of migrants, both domestic and international, moving to the county and those leaving the county per 1,000 of the county's mid-year population. A positive rate is known as a net immigration rate, and a negative rate is known as a net emigration rate.

You can also see similar information for other states and also by state for the United States.

Hover over or click on the chart to see this information for each county. The data can also be filtered, sorted, and explored further in a table below.

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Montana Net Migration Rate By County in 2021
Montana Net Migration Rate By County in 2021
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County Net Migration Rate
Beaverhead 21.87
Big Horn -10.16
Blaine -3.14
Broadwater 68.64
Carbon 40.72
Carter 10.63
Cascade 2.79
Chouteau 8.27
Custer 11.67
Daniels 20.46
Dawson -1.46
Deer Lodge 17.95
Fallon -8.94
Fergus 18.62
Flathead 38.94
Gallatin 25.26
Garfield 34.5
Glacier -0.15
Golden Valley 4.89
Granite 18.02
Hill -7.09
Jefferson 33.64
Judith Basin 9.35
Lake 29.75
Lewis and Clark 19.6
Liberty -12.84
Lincoln 51.76
McCone -11.63
Madison 39.97
Meagher 23.67
Mineral 73.41
Missoula 11.75
Musselshell 42.45
Park 22.1
Petroleum 43.05
Phillips 3.33
Pondera 24.72
Powder River 11.18
Powell 17.62
Prairie 18.3
Ravalli 44.55
Richland -19.77
Roosevelt 2.78
Rosebud -23.19
Sanders 51.24
Sheridan 11.54
Silver Bow 14.25
Stillwater 7.1
Sweet Grass 18.72
Teton 6.06
Toole 8.64
Treasure 13.11
Valley 4.23
Wheatland -9.73
Wibaux 12.82
Yellowstone 13.89