Montana Net Migration By County in 2021

According to the US Census Bureau estimates, in 2021, the net migration for Montana was 21,083. Flathead County had the highest net migration (4,128) followed by Gallatin County (3,059), and Yellowstone County (2,298). On the other hand, Richland County had the lowest net migration (-227), followed by Rosebud County (-192), and Big Horn County (-133).

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 for the US by state. You can also see links at the bottom of the page for the trend of the net migration for each county in Montana.

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.