In 2019, 1,388 people moved to Black Hawk County from within the state, according to migration data from the Internal Revenue Service.
This is a decrease from the year before, when 1,413 people migrated to Black Hawk County from elsewhere in the state.
The number of people moving to Black Hawk County is offset by the 2,954 residents who left the area during the same year.
There were 2,822 people who left the year before.
Migration data for the U.S. is based on year-to-year address changes reported on individual income tax returns filed with the IRS.
According to the U.S. Census Bureau, most U.S. regions saw their numbers shrink.
The Northeast region of the U.S. suffered the greatest losses, while the Midwest saw population growth.
The U.S. Census Bureau found migration within the country mainly flows to the South, with many people moving to areas of Florida and Texas.
| Years | Inflow | Outflow | Domestic Migration |
|---|---|---|---|
| 2017-2018 | 1,415 | 2,880 | -1,465 |
| 2018-2019 | 1,413 | 2,822 | -1,409 |
| 2019-2020 | 1,388 | 2,954 | -1,566 |
