Washington Net Migration By County in 2021

Updated on June 21, 2025.

According to the US Census Bureau estimates, in 2021, the net migration for Washington was -1,697. Clark County had the highest net migration (6,179) followed by Spokane County (3,833), and Benton County (2,476). On the other hand, King County had the lowest net migration (-28,690), followed by Whitman County (-4,181), and Yakima County (-1,086).

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 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.

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Washington Net Migration By County in 2021
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County Net Migration
Adams -178
Asotin 223
Benton 2476
Chelan 519
Clallam 1714
Clark 6179
Columbia 101
Cowlitz 856
Douglas 692
Ferry 130
Franklin -24
Garfield 66
Grant 415
Grays Harbor 1360
Island 698
Jefferson 833
King -28690
Kitsap 398
Kittitas -1078
Klickitat 436
Lewis 2269
Lincoln 404
Mason 1430
Okanogan 689
Pacific 738
Pend Oreille 510
Pierce 25
San Juan 894
Skagit 1131
Skamania 189
Snohomish 2453
Spokane 3833
Stevens 1166
Thurston 1661
Wahkiakum 178
Walla Walla -344
Whatcom -782
Whitman -4181
Yakima -1086