Counties in Washington by net domestic migration, July to June
Pierce County had the highest net domestic migration, July to June of 39 counties in 2018, at 8,560. King County had the lowest, at -5,847. The median was 448 and the figure for Washington was 45,220. Source: the U.S. Census Bureau.
Map of counties, 2018
- Under -700
- -700 to 0
- 0 to 300
- 300 to 1,400
- 1,400 and over
All counties, 2018
Full ranking
| Rank | Counties | 2018 | Change on 2017 |
|---|---|---|---|
| 1 | Pierce County Estimated | 8,560 | -17.7% |
| 2 | Spokane County Estimated | 6,474 | +0.1% |
| 3 | Clark County Estimated | 4,929 | -25.8% |
| 4 | Thurston County Estimated | 4,472 | -13.6% |
| 5 | Snohomish County Estimated | 4,291 | -43.8% |
| 6 | Whatcom County Estimated | 2,716 | -31.3% |
| 7 | Kitsap County Estimated | 2,187 | +0.2% |
| 8 | Cowlitz County Estimated | 1,830 | -5.5% |
| 9 | Mason County Estimated | 1,677 | +13.2% |
| 10 | Benton County Estimated | 1,664 | -45.9% |
| 11 | Skagit County Estimated | 1,593 | -9.7% |
| 12 | Grays Harbor County Estimated | 1,438 | +33.9% |
| 13 | Clallam County Estimated | 1,373 | -17.2% |
| 14 | Lewis County Estimated | 1,224 | -17% |
| 15 | Kittitas County Estimated | 1,014 | -2.9% |
| 16 | Island County Estimated | 1,006 | -20.2% |
| 17 | Franklin County Estimated | 935 | +154.8% |
| 18 | Jefferson County Estimated | 807 | +63% |
| 19 | Stevens County Estimated | 661 | +28.1% |
| 20 | Grant County Estimated | 448 | +69.1% |
| 21 | Pacific County Estimated | 441 | -16.5% |
| 22 | San Juan County Estimated | 344 | -23.7% |
| 23 | Douglas County Estimated | 326 | -14.7% |
| 24 | Klickitat County Estimated | 317 | -33.5% |
| 25 | Chelan County Estimated | 300 | +40.8% |
| 26 | Pend Oreille County Estimated | 279 | +13.9% |
| 27 | Okanogan County Estimated | 199 | +19.2% |
| 28 | Lincoln County Estimated | 150 | -42.1% |
| 29 | Wahkiakum County Estimated | 148 | +42.3% |
| 30 | Asotin County Estimated | 130 | -54.2% |
| 31 | Skamania County Estimated | 85 | -62.4% |
| 32 | Ferry County Estimated | 83 | +29.7% |
| 33 | Garfield County Estimated | 50 | +198% |
| 34 | Columbia County Estimated | 46 | +15% |
| 35 | Walla Walla County Estimated | 39 | -91.8% |
| 36 | Whitman County Estimated | -207 | -256.9% |
| 37 | Adams County Estimated | -217 | -2,311.1% |
| 38 | Yakima County Estimated | -745 | +36.4% |
| 39 | King County Estimated | -5,847 | -305.1% |
Other periods
About this ranking
Estimated moves into an area from elsewhere in the same country minus moves out to the rest of the country, from July 1 of the previous year through June 30 of the reported year.
More on how it is measured
- United States: states and counties.
- Canada: provinces and territories, net interprovincial migration (Statistics Canada).
- United Kingdom: local authorities, counting moves between any two UK local authorities, including across the borders of England, Wales, Scotland and Northern Ireland (ONS internal migration).
- A negative value means more people left than arrived.
Sums to zero, or close to it, for each country as a whole, so there is no national value.
Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. Equal values share a rank.
How to cite
U.S. Census Bureau. Population Estimates Program: net domestic migration, states and counties, July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Retrieved 2026-10-12.Citation styles
APA 7
U.S. Census Bureau. (2026). Population Estimates Program: net domestic migration, states and counties, July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021 (Counties in Washington by net domestic migration, July to June, 2018) [Data set]. Retrieved October 12, 2026, from https://www.census.gov/programs-surveys/popest/data/data-sets.html
MLA 9
Population Estimates Program: net domestic migration, states and counties, July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021, Counties in Washington by net domestic migration, July to June, 2018. U.S. Census Bureau, 26 Mar. 2026, https://www.census.gov/programs-surveys/popest/data/data-sets.html. Invokely, https://invokely.ai/rankings/net-domestic-migration-july-june/washington-counties?period=2018. Accessed 12 Oct. 2026.
Chicago (author-date)
U.S. Census Bureau. 2026. Population Estimates Program: net domestic migration, states and counties, July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021. Counties in Washington by net domestic migration, July to June, 2018. Dataset. Accessed October 12, 2026. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Also distributed by Invokely, https://invokely.ai/rankings/net-domestic-migration-july-june/washington-counties?period=2018.
Harvard
U.S. Census Bureau (2026) Population Estimates Program: net domestic migration, states and counties, July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021, Counties in Washington by net domestic migration, July to June, 2018 [Dataset]. Available at: https://www.census.gov/programs-surveys/popest/data/data-sets.html, via Invokely: https://invokely.ai/rankings/net-domestic-migration-july-june/washington-counties?period=2018 (Accessed: 12 October 2026).
BibTeX
@misc{census_counties_in_washington_by_2018,
author = {{U.S. Census Bureau}},
title = {{Population Estimates Program: net domestic migration, states and counties, July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021: Counties in Washington by net domestic migration, July to June, 2018}},
year = {2026},
howpublished = {Data set},
url = {https://www.census.gov/programs-surveys/popest/data/data-sets.html},
urldate = {2026-10-12},
note = {Accessed via Invokely, https://invokely.ai/rankings/net-domestic-migration-july-june/washington-counties?period=2018. Publisher attribution: U.S. Census Bureau. Population Estimates Program: net domestic migration, states and counties, July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Retrieved 2026-10-12.},
}
RIS
TY - DATA
AU - U.S. Census Bureau
TI - Population Estimates Program: net domestic migration, states and counties, July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021: Counties in Washington by net domestic migration, July to June, 2018
PY - 2026
DA - 2026/03/26
PB - U.S. Census Bureau
DB - Invokely
UR - https://www.census.gov/programs-surveys/popest/data/data-sets.html
L2 - https://invokely.ai/rankings/net-domestic-migration-july-june/washington-counties?period=2018
Y2 - 2026/10/12
N1 - Accessed via Invokely, https://invokely.ai/rankings/net-domestic-migration-july-june/washington-counties?period=2018.
N1 - Publisher attribution: U.S. Census Bureau. Population Estimates Program: net domestic migration, states and counties, July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Retrieved 2026-10-12.
ER -
Use this data in your AI agent
Invokely serves this figure to AI assistants through MCP and to code through a REST API, with the source and citation attached. Ask your assistant:
Rank Counties in Washington by net domestic migration, July to June using official data, and cite the source.
rank_places {"indicator":"net_domestic_migration_july_june","level":"province","within":"Washington","limit":10}
GET https://invokely.ai/api/v1/rank?indicator=net_domestic_migration_july_june&level=province&within=Washington&limit=10Questions
Which county has the highest net domestic migration, July to June?
Pierce County, with 8,560 in 2018, according to the U.S. Census Bureau.
Which county has the lowest net domestic migration, July to June?
King County, with -5,847 in 2018.
Where does this ranking come from?
Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, Population Estimates Program: net domestic migration, states and counties, July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021. Retrieved 2026-10-12.