Idaho Net Migration Rate By County in 2021

According to the US Census Bureau estimates, in 2021, the net migration rate per 1,000 population for Idaho was 27.82. Boise County had the highest net migration rate per 1,000 population (66.47), followed by Lewis County (54.59), and Adams County (49.94). On the other hand, Clark County had the lowest net migration rate per 1,000 population (-3.78), followed by Elmore County (2.43), and Madison County (4.97).

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.