Seattle City Wire

In 2019, 63,754 people moved to King County from across the U.S and other countries, according to migration data from the Internal Revenue Service.

This is an increase over the year before, when 63,651 people migrated to King County.

The number of people moving to King County is offset by the 70,191 residents who left the area during the same year.

There were 60,749 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.

Analysis from the Tax Foundation found that U.S. residents are flocking within the country to states with lower taxes. Florida and Texas, which don't have income tax, saw the highest migration rates in 2021-2022.

The study also showed that high-tax states, such as New York and California, are suffering from diminishing populations. A separate report from the Fiscal Policy Institute reported that more than 300,000 people alone left New York state in 2021 and 2022.

Years	Inflow	Outflow	Domestic Migration
2017-2018	63,819	64,891	-1,072
2018-2019	63,651	60,749	2,902
2019-2020	63,754	70,191	-6,437