IRS data show urban outflows to exurban counties
In 2020 Ada County posted a net migration loss within Idaho. Simply stated, more Idaho residents moved out than moved in.
Inbound migration to the state’s most populous county from other parts of Idaho totaled 8,039, while outbound migrants numbered 10,610 for a net migration loss of 2,571. Where did they go?
Figure 1: Ada County largest net migration losses, 2020
Source: IRS data accessed through Lightcast.io, Feb. 14, 2023
With the exception of outflows to Idaho County, the largest number of Ada County residents migrated to counties within the commute shed – an area within a 30-minute commute – with 1,874 leaving for neighboring Canyon County.