Ranking of Washington Counties By Net Migration in 2018

Updated on June 21, 2025.

Based on the US Census Vintage data estimates, in 2018, the Net Migration for Washington was 68.83K. Among all Washington counties, King County had the highest net migration (11.82K), followed by Pierce County (9.65K), and Snohomish County (6.81K).

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 2018
King
Pierce
Snohomish
Spokane
Clark
Thurston
Whatcom
Kitsap
Benton
Cowlitz
Ranking of Washington Counties By Net Migration in 2018
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Rank County Net Migration
1 King County 11815
2 Pierce County 9648
3 Snohomish County 6805
4 Spokane County 6795
5 Clark County 5272
6 Thurston County 4668
7 Whatcom County 3073
8 Kitsap County 2236
9 Benton County 1923
10 Cowlitz County 1829
11 Mason County 1803
12 Skagit County 1711
13 Clallam County 1439
14 Grays Harbor County 1421
15 Lewis County 1263
16 Kittitas County 1078
17 Franklin County 960
18 Island County 922
19 Jefferson County 816
20 Stevens County 667
21 Grant County 499
22 Pacific County 469
23 San Juan County 371
24 Douglas County 348
25 Klickitat County 314
26 Pend Oreille County 279
27 Chelan County 268
28 Okanogan County 228
29 Whitman County 210
30 Lincoln County 151
31 Wahkiakum County 148
32 Asotin County 121
33 Skamania County 91
34 Ferry County 84
35 Walla Walla County 81
36 Columbia County 64
37 Garfield County 56
38 Adams County -216
39 Yakima County -885