Ranking of Washington Counties By Net Migration in 2021

Updated on June 21, 2025.

Based on the US Census Vintage data estimates, in 2021, the Net Migration for Washington was -1.70K. Among all Washington counties, Clark County had the highest net migration (6.18K), followed by Spokane County (3.83K), and Benton County (2.48K).

The chart below shows the top 10 counties, and the table below shows the ranking of all Washington counties.

You can see similar ranking information for related topics, and for other states. You can also see the ranking of all counties in the United States.

See this for other years:
Ranking of Washington Counties By Net Migration in 2021
Clark
Spokane
Benton
Snohomish
Lewis
Clallam
Thurston
Mason
Grays Harbor
Stevens
Ranking of Washington Counties By Net Migration in 2021
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Rank County Net Migration
1 Clark County 6179
2 Spokane County 3833
3 Benton County 2476
4 Snohomish County 2453
5 Lewis County 2269
6 Clallam County 1714
7 Thurston County 1661
8 Mason County 1430
9 Grays Harbor County 1360
10 Stevens County 1166
11 Skagit County 1131
12 San Juan County 894
13 Cowlitz County 856
14 Jefferson County 833
15 Pacific County 738
16 Island County 698
17 Douglas County 692
18 Okanogan County 689
19 Chelan County 519
20 Pend Oreille County 510
21 Klickitat County 436
22 Grant County 415
23 Lincoln County 404
24 Kitsap County 398
25 Asotin County 223
26 Skamania County 189
27 Wahkiakum County 178
28 Ferry County 130
29 Columbia County 101
30 Garfield County 66
31 Pierce County 25
32 Franklin County -24
33 Adams County -178
34 Walla Walla County -344
35 Whatcom County -782
36 Kittitas County -1078
37 Yakima County -1086
38 Whitman County -4181
39 King County -28690