Washington Net Domestic Migration Rate By County in 2021

Updated on June 21, 2025.

According to the US Census Bureau estimates, in 2021, the net domestic migration rate for Washington was -2.03. San Juan County had the highest net domestic migration rate (48.62) followed by Wahkiakum County (39.19), and Pend Oreille County (37.08). On the other hand, Whitman County had the lowest net domestic migration rate (-95.38), followed by Kittitas County (-23.7), and King County (-16.5).

Net Domestic migration rate for a given county refers to the the difference between number of people moving to the county from other parts of the United States (excluding Puerto Rico) and number of people moving out of the county to other parts of the United States (excluding Puerto Rico) per 1,000 of the mid-year population of the 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 Domestic Migration Rate By County in 2021
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County Net Domestic Migration Rate
Adams -10.95
Asotin 9.73
Benton 10.93
Chelan 6.22
Clallam 21.46
Clark 11.26
Columbia 25.09
Cowlitz 7.34
Douglas 14.25
Ferry 17.81
Franklin -2.07
Garfield 27.99
Grant 3.36
Grays Harbor 17.67
Island 7.78
Jefferson 24.41
King -16.5
Kitsap 1.09
Kittitas -23.7
Klickitat 17.61
Lewis 26.77
Lincoln 36.29
Mason 20.45
Okanogan 14.65
Pacific 30.03
Pend Oreille 37.08
Pierce -0.91
San Juan 48.62
Skagit 7.72
Skamania 15.09
Snohomish 1.16
Spokane 6.55
Stevens 24.69
Thurston 4.94
Wahkiakum 39.19
Walla Walla -6.71
Whatcom -4.36
Whitman -95.38
Yakima -5.77