Montana Net Migration By County in 2020

According to the US Census Bureau estimates, in 2020, the net migration for Montana was 9,950. Gallatin County had the highest net migration (1,887) followed by Flathead County (1,871), and Missoula County (1,479). On the other hand, Big Horn County had the lowest net migration (-252), followed by Hill County (-246), and Cascade County (-228).

Net migration 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. Or to put it simply, the net migration for a given county is the inbound migration minus the outbound migration for that county.

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.