Migration to and from Mason County, Washington
Where Mason County residents came from and where they went over the 5-year window 2016-2020. Census ACS County-to-County Migration Flows, 2020 5-yr (frozen vintage).
Total inflow
5,469
people moved in (5-yr)
Total outflow
4,679
people moved out (5-yr)
Net migration
+790
inflow minus outflow
Top 10 counties people moved IN from
| Origin | State / Region | People (5-yr) |
|---|---|---|
| Kitsap County | Washington | 1,121 |
| Thurston County | Washington | 872 |
| King County | Washington | 730 |
| Pierce County | Washington | 427 |
| Snohomish County | Washington | 139 |
| Skagit County | Washington | 127 |
| Lake County | Illinois | 123 |
| Lewis County | Washington | 123 |
| Clark County | Washington | 110 |
| San Diego County | California | 104 |
Top 10 counties people moved OUT to
| Destination | State / Region | People (5-yr) |
|---|---|---|
| Grays Harbor County | Washington | 760 |
| Kitsap County | Washington | 712 |
| Thurston County | Washington | 453 |
| King County | Washington | 366 |
| Snohomish County | Washington | 270 |
| Pierce County | Washington | 251 |
| Lewis County | Washington | 141 |
| Maricopa County | Arizona | 131 |
| Jefferson County | Washington | 129 |
| Walla Walla County | Washington | 104 |
Explore Mason County
- Business data for Mason CountyConstruction sector establishments, employment, payroll
- Cities in WashingtonACS demographic profiles for places statewide
- ZIP code lookupSearch demographic data by ZIP code
- Opportunity IndexRank counties by business growth potential
- Federal contracts in WAGovBids: RFPs, awards, NAICS matching
- New business filings in WashingtonNewFilings: fresh SOS registrations
Methodology
- Counts represent the number of people aged 1+ who reported a different residence at the survey reference date than they did one year earlier, aggregated across the 5-year sample window 2016-2020.
- Outbound (OUT) flows are reported less frequently than inbound (IN) because the survey captures the destination side of each move. Many county pairs have null OUT counts, which is normal.
- "Total inflow" sums the published MOVEDIN counts across all origin counties, including foreign-region inflows (Africa, Asia, Central America, etc.). It is not the same as net population change.
- Frozen vintage. The Census Bureau has not released a newer county-to-county migration flows file. The 2020 5-yr vintage (covering 2016-2020) is the latest available as of build date.
Source: U.S. Census Bureau, American Community Survey, County-to-County Migration Flows: 2016-2020. Vintage: 2020 5-yr. Generated: 2026-05-28. FIPS: 53045.